This change also tweaks more_suggestions_hint drawables to eliminate
unnecessarily padding at the bottom.

Bug: 5204563
Change-Id: If5ec731c9a490da0116a020e8fd405c7d025d707

Bug: 5095140
Change-Id: I7000f752bc9b7fd6a7af4839b2f225c085300128

This is preparation to have the decrypting/unzipping code
moved over to LatinIME.

Bug: 5095140
Change-Id: Ic3fdcc3de673b46cef2eb9ebe6a52cbdd614e50a

This change also introduces "AsciiCapable" extra value for subtype
that indicates the subtype can input any ASCII code point from its
keyboard layout.

Only if the input field has "forceAscii" private IME option and the
current subtype doesn't have "AsciiCapable" extra value, the en_US
keyboard layout will be used for the input field.

Bug: 3384942
Change-Id: I25e2553e37ecb5002df1164e45f6273845fe463b

Change-Id: I3ea8ffcdefcefaa82ae76a31bb65977009d8a040

Bug: 5182291
Change-Id: I5089a14902b9f4ff1ab4f34e3f7a42aca5040d3e

LatinIME has several fallbacks to ensure a dictionary is used.
However, it should now be possible to deactivate the main dictionary
through the dictionary pack settings. In this case, Latin IME should
not fallback to the built-in dictionary.

Change-Id: Ibd992ad89793169f04a968b40781fce819b87b6f

Bug: 5182291
Change-Id: I6a88ed4df3ec98e31ea4966d82da56f7fca342ac

Bug: 4311428
Change-Id: Ie7e094ded9c7c1fe811b7eb97bc33ffecb29a73c

This also adds some optional debug code to detect more easily possible
future occurrences of the same problem.

Bug: 5195017
Change-Id: I2558b468e46f7090de868f1ec2dc9e24895d670f

This change also shows the valid typed word in bold face.

Bug: 5161713
Change-Id: I15355a11888fc8ef90ecc8b64a52eb08c1a2b367

Bug: 5175740
Change-Id: I592401b3b8c3074d70e06dc3a9919cc3cb47ba49

Bug: 4311428
Change-Id: Ic93f264101d13963503fcd447a69bbffd06e69f3

The new behavior is as follows:
- If the word in the dictionary is not fully lower case, then the
exact case is required to match.
- If the word in the dictionary is fully lower case, then any of
the following patterns match:
  - fully lower case
  - only the first char capitalized
  - all caps
Any other capitalization is rejected.

This is probably what people want. If you type a name in all lower
case, it should be marked as a typo, but if you type a word with a
capital for emphasis or just because it's the start of the sentence,
it should match a lower case word in the dictionary. If you have
a spurious capital letter in the middle of a word because of a typo,
it should be marked as such.

Accents are not affected, and should not be. An accented letter
is a different letter and a missing accent should be reported.
We should maybe consider again for some common transpositions
like the "ue" digraph for German, which is now considered a typo,
but will suggest the correct diacritics as the first suggestion.

Bug: 5145751
Change-Id: I651e24f13c90fb94700a1674ad380e95336e7dca

by ignoring its preference value, when the "show settings key option" in
the settings is disabled.

Change-Id: I934be2d9eb0bf6bf731e03f5d9b752de4a7a1c7c

This is preparation for bug: 5175740

Change-Id: I18b2042317f740cb1e021d3dfbf90ecfbb1a1d37

Bug: 5175868
Change-Id: I165eee4c865caa5ee1daf3e0b1acde8788b996ef

Bug: 5095140
Change-Id: I02032923ca2a65bd8fbabc0abbe6a476f7542187

This change refactors the dictionary selection code so that the
cached dictionary files list and the settings tests are more
cleanly separated.
This will also help with future refactorings that will test for
the presence of the main dictionary and insert the fall back if
it's not supplied by the dictionary pack.

Bug: 5095140
Change-Id: I8d7caad7c054031df71fe78b043801a774d50f65

This is internal refactoring, done as preliminary work to fix
Bug: 5175740

Change-Id: I21bd4c001c27e7b925ddb87a152105b4dcab320a

The next step is to move this over to the Utils class.
The ultimate goal is to make use of the duplicate removal code
also in the spell checker as per
Bug: 5175740

Change-Id: Ica36691b843b0713b832c56ffc65e5b2ec427c4a

Now that the dictionary pack can return several files, it's better
to handle IO exceptions for each file rather than globally. This
also will help with next implementation steps.

Bug: 5095140
Change-Id: I5ed135ad2ad4f55f61f9b3f92c48a35d5c24bdb2

This is essentially refactoring to help next steps

Bug: 5095140
Change-Id: Ic97044d2ed354027bac4f84e6ce69d20ef6da092

This change also reverts I1350ad3d.

Bug: 5156762
Change-Id: I047e75699e8eea02204ad95e12dcc0aefe49ac34

Bug: 5171442
Change-Id: I280f6a0ef5fb06f1e03e17c0065d078604e4747a

Bug: 5156851
Change-Id: Icaba54734eb790b40dc2012aac25df5b2af71dbb

The dictionaries and proximities are not thread-safe. In order to
be able to check spelling in parallel, make a dictionary pool to
call upon when a spelling check is necessary.

Bug: 5156851
Change-Id: Ie3796164187dd7b7abf5ccd5d014073d43d74408

Until the dictionary itself is re-entrant, unfortunately we have
to synchronize accesses to it.

Bug: 5156851
Change-Id: I1629a160d707e6fa1ad80cba828798abb24b68b1

bug: 5156762
Change-Id: I1350ad3d7125f8ecdfc699233ed05e253cc3f010

Bug: 5156940
Change-Id: I762de1296f861abce2d0413404bca54571e0ea0a

Bug: 5095140
Change-Id: I227fbd95d8a0330b6dede6de99fde3a5a715fe2d

bug: 5145886
Change-Id: Ic599373ee17423ef9c61b3dd5177c3763aa31015

Dictionaries are now copied over from the dictionary pack to Latin IME.
This change enables Latin IME to use all dictionaries that have been
cached until now.

Bug: 5095140
Change-Id: Id9a2bacf9dc1c693189b0ac8aa3f75756dc1e3e6

Bug: 5095140
Change-Id: Idf66a04c6a1a05015f94187a8dbce3d443bbf38b

Bug: 5095140
Change-Id: I64552861768ca30073ffe0d631b2e0c44dad4aa9

Using only a single thread may slow down the application, if there is already another thread running.

Bug: 5142142
Change-Id: I314480a58af20ea09458ff82e586304fc3c7c070

Bug: 5095140
Change-Id: I764471e54ce0bf6aefe5d604cee97639d5ad0af9

bug:5136497
Change-Id: Iab7c68135500e9fed212521484090b52943550ca

Bug: 5119987
Change-Id: I35700fd8b0ffa6bced428cc6d46b3f64eb251281

Also some minor cleanup: remove unused methods, minor refactoring into methods.

Bug: 5095140
Change-Id: I035537b37a31adfc8db3b933fb0cefcf703d6c7c