This change re-origanizes view hierarchy of IME's input view.

Change-Id: I9d0a07692d0f41de3345d207366393bcd5424f7e

The usability study mode has been broken.

bug: 10251399
Change-Id: Iaa301241f102f412fa073f0d8b897a4c8b265a9c

* commit '6d2399c0':

* commit 'c31f7d79':

* commit '7cb1b82f':

* commit '9f2ba37f':

* commit '5a9d8757':

* commit '3cd6811e':

* commit '49051644':

* commit '1058753c':

* commit 'ff083cac':

* commit 'd7309ec4':

* commit '7b436eac':

Change-Id: I827052f234eeaa4dbcfd37da69a99866896a158b

To support various format dictionary, extendable
buffers or multiple files.

Bug: 6669677
Change-Id: I203a5a4adc049a6322cfba4eacb4cb6715f8dfc2

* commit '5c057b32':
  Fix unit tests.

* commit '96b444d4':
  Remove processMotionEvent from MoreKeysKeyboardView

* commit '1181c5ac':
  Fix to follow the field naming conventions.

* commit 'd7b76727':
  Make user and contacts dict use ver3 format.

* commit 'f6b7c3a6':
  Fix parent position reading for ver3 dict.

* commit '769aefe0':
  Increase CHAR_LIMIT to 29 to accommodate German.

* commit '60eb2501':
  Support ver3 dict in native code.

* commit 'b0ab71be':
  Implement getTerminalNodePositionOfWord for ver3 dict.

* commit '7b8b6e4b':
  Adjust a test for a spec change.

* commit '4456d1a8':
  Have double-space-to-period cancel leave a single space

* commit 'f9456855':
  Import translations. DO NOT MERGE

Change-Id: I46830f8482b46c6999b80793c8b4ae860b46e429

Change-Id: Ic0013089625e112aaccc888d462330640ef7cc6f

Bug: 6669677
Change-Id: Ia55d4ecb43c7d37b9bc466b848d5142bc13cd823

Change-Id: I5373df4a7c82f964f99acf70325bba8702111a75

Bug: 10221961
Change-Id: Ib9967f7a258f499d24294da16a9191cc2dda4a32

Bug: 6669677
Change-Id: I6a20eed2c8afdd1c16ada5bf85067864c7cd2a7f