This still returns the unigram frequency, because the values stored
for bigrams in the dictionary are not ready to be returned in-place
instead of unigram values. Aside from this, the code is complete.

Bug: 6313806
Change-Id: If7bb7b644730782277f0f6663334c170b7fe13fb

* Fix missing delete key for greek
* Remove shift keys from farsi
* Move delete and enter key down for farsi
* Tweak 3rd-row key position of nordic

Bug: 6422448
Change-Id: I2066c1927f60660513c89615488520f716a15fa5

* Remove right shift key from hindi (same as east_slavic)

Bug: 6422448
Change-Id: Icea9a027c825f74471425abea261d5499f02c2c6

* Remove right shift key from thai
* Add comma and period keys

Bug: 6422448
Change-Id: I40ff445ee763d964860fe6eb46e7168534a98c35

* Tweak key width and positon for arabic.
* Move delete and enter key down for farsi.

Bug: 6422448
Change-Id: I4fce1f4761eb1b53e432900c19e455a023721fc6

* Add gutters between shift keys and letters for nordic
* Slightly narrower 3rd-row letter keys for bulgarian
* Remove "ъ" key from 1st-row of east_slavic
* Remove right shift for 11-11-9 east_slavic and south_slavic

Bug: 6422448
Change-Id: I2311bd475aabda51080f0be3714fabffa65b2009

Bug: 6422448
Change-Id: I0c1721462572da7be7850d670c4f86d0c18cb610

Change-Id: Iaaade378acb81a2d68e2e721778a82fd8d5e20a5

* Slightly smaller key width and larger shift key and space key.
* Both left and right shift key has the same width.
* Move the 2nd-row slight right.

Bug: 6422448
Change-Id: If27028eaac20c503c352ba35dd156befc53918c7

Bug: 6464677
Change-Id: I443e4add8052dbce1d413c2ce38a7b98408613bf

Bug: 6135881
Change-Id: Id1c4e2c13d13b474466cb9b42b425aa9f6f9448b

Bug: 6457266
Change-Id: I52c9fe88791d2c3a4385dfa457f07da160c60699

Bug: 6464226
Change-Id: I30c1b01be5e1719ded5f7f8a7e24a38e9bbc3637

Change-Id: I067249976e557b60b606d2153deaeb3c8f1f38ac

Bug: 6464226
Change-Id: I03745bbcc21e5ec6ca57fa1257bf21c0cd26391a

Change-Id: I73882668b516344d36e69355e9cb39534becb629

Bug: 6457558
Change-Id: If33ca6f026d4846ba79a701ef42c0112f5b0b488

To match with the requirements of Id1c4e2c1

Bug: 6135881
Change-Id: If877fffb3863101edec2fa96f1fa4ae016c017f1

Bug: 6435484
Change-Id: Iccca7d1b770c547efae0b5e5931cebd910083d40

Bug: 6449347
Change-Id: I897df3a3c5464eaccf04c8b1cba70ccf313dd0bb

This change also eliminate useless attribute longPressSpaceKeyTimeout
of LatinKeyboardView.

Bug: 6449356
Change-Id: Ib4dace4b9510c0eb96bdddacf8e0dbaa14fcfbbf

Change-Id: Ic65c9b1373f39ff3fde9631e516d56b05eae2d1f

Bug: 6435348
Change-Id: Iaaac9042e7e6cb21a3f2243bc6e8e055cc24f74d

Passing the position will not allow us a reasonable lookup
time. Replace this with a map and bloom filter for very fast
lookup.

Bug: 6313806
Change-Id: I3a61c0001cbc987c1c3c7b8df635d4590a370144

Bug: 6313806
Change-Id: Ib79e14f6f8b241f053da6069c15f19c71084317e