* Shift + swiping space now lets you select text
* Text editor uses more consistent selection logic instead of sending dpad and relying on apps to implement shift+dpad selection, which many of them don't. Dpad is still used for up/down

See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 161896447
Test: tapas LatinIME && m
Change-Id: I2ffb39ff70f61e579b62761d3da526a545dead1f

1. Add mechanism to detect a slow or non-resonsive InputConnection (IC)
2. When IC slowness is detected, skip certain IC calls that are known
   to be expensive (e.g., getTextAfterCursor).
3. Similarly, disables learning / unlearning on a slow IC.
4. IC slowness flag is reset when starting input on a new TextView or
   when a fixed amount of time has passed.

Note: These are mostly temporary workarounds. The permanent solution is
to refactor RichInputConnection so that it is less sensitive to IC
slowness in general.

Bug: 21926256
Change-Id: I383fab0516d3f3a8e0f71e5d760a8336a7730f7c

Users rarely tap on committed words, and the cost of sending the spans back
through the input connection, back and forth to the target app, is too high.

Bug 21926256.

Change-Id: I8e55b57ce2148ed313dc927425b6d9c958634958

We never delete text after the cursor, so constrain the API accordingly.
Define the number of characters to read before and after.
Set them to reasonable values.
The next CL will start caching text after the cursor.

Bug 21926256.

Change-Id: Idd58daf68614de4a69344aa3c8a4323720c5d3a0

Bug: 20681528
Change-Id: I80e7095b70a151f3ccc36856d7e0837613a35972

Bug: 20681528
Change-Id: I80e7095b70a151f3ccc36856d7e0837613a35972

Confusingly, specifying a null Locale object to the constructor
of SuggestionSpan does not necessarily mean that
SuggestionSpan#getLocale() returns null.  The constructor in
question also receives Context object, and Context's locale can
be used as a fallback locale to initialize locale of
SuggestionSpan.

With this CL, LatinIME always specify non-null Locale object
when instantiating SuggestionSpan object.  It basically
corresponds to the active main dictionary, but can be
Locale#ROOT when one locale is not determined for some reasons.

BUG: 20435013
Change-Id: I2c152466410327300e7dba4d7ed9a22f57c17c4f

Bug: 20150386
Change-Id: I2ed69aba7b1fdaba1e2ac07b8218a265dfe23e09

Change-Id: Id08daf7c06e874b43deed77a49b65969dadb1565

Bug 19987461.

Change-Id: If5bb798a350e9083ee8b67a84af132c100f0a7eb

Bug 19987461.

Change-Id: Ibeebb9f1b1c4f3a9ed988c9e20209a9c83b5a359

Bug 19987461.

Change-Id: Ia2714f555146f8f31a6d8c61f555d2b6fecdab7d

These occur when the user moves the cursor into a word.

Bug: 19571104
Change-Id: Ibc2e4f0146f7c1130ad078bd0c0a871dafa5d694

Change-Id: I36358e551d6c51e786b6e09b1a1368ebf3c48f69

Change-Id: Ic3d7d11ad90cc09edf62f48aa5362e71d692f7dd

Bug: 19712589
Bug: 19715579
Change-Id: Ie06665cab8405455c1b0a2ff034e0bb0731c9156

Bug 19825927.

Change-Id: If65b56aa5c269e47bcc609bdc673ba18c450ee66

Bug: 19715579
Change-Id: Ic48de74bde0f9f5d5e68e8289948cc5e92cbfa1e

InputLogic should not have code that tweaks suggestion ranking based on the
language of the source dictionary.

Bug 19744396.

Change-Id: I8c0849555e74cec1302e78da04148dedd1cddabe

This reverts commit 1ae16dc3.

Bug 19596067.

Change-Id: Ie7286acbb70b215d7bd08e271bcf14526b68576f

This fixes unit tests and brings us closer to a green build.

Change-Id: Iffcc392eda4a7671a238b79cc7367320ca648725

Bug: 19687841
Change-Id: I0862aa3127bf7f1564a4845efdf99ebf5ae4d5ac

This is required for the final corrected word to be learned,
as learning only occurs when suggestions are active.

Note: This is already happening when backspacing into a non-reverted
word

Bug: 19619907
Bug: 18465402
Change-Id: I99a1d4f0ca0d62a2cdfa24cc0833ce89391715d9

This feature works in supported languages.
We don't need a user setting.

Bug 19596067.

Change-Id: Icdded772745f9816da47f8a5e3b87b733083b121