Since some variables with module LatinIME are defined but not used,
when compiled with build combination "sdk_pc_x86_64-userdebug" and
build command "mmm packages/inputmethods/LatinIME", the following
code lines will be reported that "variable 'XXX' set but not used".
(should be similar for all the other build combinations)

Repeated 10 times for each:
terminal_position_lookup_table.cpp:74:9 removedEntryCount
terminal_position_lookup_table.cpp:85:9 removedEntryCount
proximity_info_state_utils.cpp:493:9 tempTime
trie_map.cpp:56:9 unusedRegionSize
suggestion_results.cpp:100:9 index

Repeated 80+ times:
proximity_info_utils.h:75:25 proximityChar

With this patch we are removing some of the unused variables and
putting the C++ 17 attribute [[maybe_unused]] to the others which
are used for logging. Then all the related build warnings have been
eliminated.

Test: mmm packages/inputmethods/LatinIME, presubmit check.

Change-Id: Ia66766322d6ae8a010b1cb55cc22993fbc6d012c
Signed-off-by: Jing Mike <jingyangliu@eswincomputing.com>

Bug: 18725954
Change-Id: Ia442ba4b5d84311057d83edf6e7aeb151d6a820b

Bug: 18725954
Change-Id: I3c823fda1b7daf41d82b118d9495f5f2356a1a5e

Bug: 18725954
Change-Id: I8fcb0d15dda3f823a4575fe707bcdec57ff5e89b

Bug: 18725954
Change-Id: Ic97d3a56b036ff042322c9f794504064046fd7d7

Bug: 7677193
Change-Id: I66eddbf27a9db8682c0347a1be19922792a3bea7

Before:
Total words: 1134659, Success Num: 944709, Success Percentage: 83.259%
Bad Failures, with auto-correction (typed word == expected word, output word != expected word): 1258, Bad Failure Percentage: 0.111%
Failures, with auto-correction (F-C): 28013, F-C Percentage: 2.469%
Max Keystrokes: 6072844, Min Keystrokes: 3347332, Keystroke Saving Percentage:44.880%

After:
Total words: 1134665, Success Num: 945026, Success Percentage: 83.287%
Bad Failures, with auto-correction (typed word == expected word, output word != expected word): 1271, Bad Failure Percentage: 0.112%
Failures, with auto-correction (F-C): 27756, F-C Percentage: 2.446%
Max Keystrokes: 6072850, Min Keystrokes: 3290996, Keystroke Saving Percentage:45.808%

Change-Id: I16af52a3e9c371b95fd6f0741f45ee6b2443bea6

Change-Id: Ie28768ceadcd7a2d940c57eb30be7d4c364e509f

Bug: 17797064
Change-Id: Ie992c9454edfc3bf93d5ea367c3a4427b513a205

Change-Id: Idf03e97661d64186c752e35964d641a5528be5b1

Change-Id: Ib69569ab6b6edfcc8c1d2c621b95de4127789ab6

Without personalization:
Total words: 1134774, Success Num: 899230, Success Percentage: 79.243%
Bad Failures, with auto-correction (typed word == expected word, output word != expected word): 1871, Bad Failure Percentage: 0.165%
Failures, with auto-correction (F-C): 29084, F-C Percentage: 2.563%
Max Keystrokes: 6072959, Min Keystrokes: 4436090, Keystroke Saving Percentage:26.953%

Before:
Total words: 1134646, Success Num: 925194, Success Percentage: 81.540%
Bad Failures, with auto-correction (typed word == expected word, output word != expected word): 1316, Bad Failure Percentage: 0.116%
Failures, with auto-correction (F-C): 28288, F-C Percentage: 2.493%
Max Keystrokes: 6072831, Min Keystrokes: 3946188, Keystroke Saving Percentage:35.019%

After
Total words: 1134659, Success Num: 944746, Success Percentage: 83.263%
Bad Failures, with auto-correction (typed word == expected word, output word != expected word): 1258, Bad Failure Percentage: 0.111%
Failures, with auto-correction (F-C): 28016, F-C Percentage: 2.469%
Max Keystrokes: 6072844, Min Keystrokes: 3387333, Keystroke Saving Percentage:44.222%

Change-Id: I3af42ec37a11847c0429c28616e726f6a339247f

Bug: 14425059
Change-Id: Ib050574aa7c4babd4285322a11c3af9be9fbab1e

count -> 2B, level -> 0B.

Change-Id: I3b241126f56eb33cdf09cb1ebfed04f534e4ec48

Previously, when both legitimate 0-frequency words (such as
distracters) and offensive words were encoded in the same
way, distracters would never show up when the user blocked
offensive words (the default setting, as well as the setting
for regression tests).

When b/11031090 was fixed and a separate encoding was used
for offensive words, 0-frequency words would no longer be
blocked when they were an "exact match" (where case
mismatches and accent mismatches would be considered an
"exact match"). The exact match boosting functionality meant
that, for example, when the user typed "mt" they would be
suggested the word "Mt", although they most probably meant
to type "my".

For this reason, we introduced this change, which does the
following:
* Defines the "perfect match" as a really exact match, with
no room for case or accent mismatches
* When the target word has probability zero (as "Mt" does,
because it is a distracter), ONLY boost its score if it is a
perfect match.

By doing this, when the user types "mt", the word "Mt" will
NOT be boosted, and they will get "my". However, if the user
makes an explicit effort to type "Mt", we do boost the word
"Mt" so that the user's input is not autocorrected to "My".

Bug: 11031090
Change-Id: I92ee1b4e742645d52e2f7f8c4390920481e8fff0

If the user has chosen to block offensive words and types
"aaaxbb", where "aaa" is an offensive word and "bb" is not,
we should not suggest "aaa bb".

Bug: 11031090
Change-Id: Ie23b8dd5d347bc26b1c046c3f5e8dfbc259bf528

Bug: 11031090
Change-Id: I5cc0d006ab003656498eb82b0875eb9c051d331e

Bug: 14425059

Change-Id: Icc15e14cfd77d37cd75f75318fd0fa36f9ca7a5b

Bug: 14425059
Change-Id: Ia58ab3f0ead02798046d182a9464dcbd95f086bc

Bug: 14425059
Change-Id: I3e5d359ba5fa38f1669f0e98dfae792ff53efbf8

Change-Id: I1697a907562d1ed6aff2b001763d1594263ba0d3

Bug: 14425059
Change-Id: I08ec19903432356b6028853fd73b4eefce20218e

Bug: 17432052

[Category diff]
+1     262
-1      93
+2       2
-2      18
+3      18
-3       2
+4     111
-4     148
+5     295
-5     217
+6      51
-6     276
+7     139
-7     124

[Weighted category diff]
+1     276
-1     100
+2       4
-2      20
+3      20
-3       4
+4     118
-4     160
+5     309
-5     225
+6      52
-6     298
+7     163
-7     135

show diff for ./en_user_log_phones_2011_08.csv
+1     173
-1      28
+2       2
-2      17
+3      17
-3       2
+4      63
-4      82
+5     120
-5      51
+6      24
-6     220
+7      88
-7      87

Change-Id: I9d673acb0ff632828ae2e0ead56e76e3a20411c6

If a word is once deleted, the word never gets into the
personalized dictionaries due to this bug.

Change-Id: Ife4e3fe1ba0615b4135e6291d2151b0db7d3f940

Bug: 14425059
Change-Id: I45ae00069dd3b7c461dd9a1f3558b96af0a1c975

Bug: 14425059
Change-Id: Ib03a0c3d166ed6f1e60c67127b28006d55143b6b

Bug: 14425059
Change-Id: I98cb9fa303af2d93a0a3512e8732231c564e3c5d

Change-Id: Id94636714d04a8828718b87741c0ee62a14cb3b4

Bug: 14425059
Change-Id: I210acb816b122857dbbe1ee4dd6a35c5335bf2bf

Bug: 14425059

Change-Id: Ie950878817b9c80cc9c970e1a84880c9b9ab228a

Bug: 14425059
Change-Id: I61eb798686dc753fb6c0fe99a0719c1732198f30

Bug: 14425059

Change-Id: Ic13ba827d96fa4a147485ba92fdb37e23e04e8e8