Also introduce some unit tests that would have caught the bug.

Bug: 17398284
Change-Id: Idb715b7bd2f70992d6cdf4e25ef368809382caef

* commit 'd9458302':
  Update active key backgrounds

* commit '9d3db691':
  Update active key backgrounds

* commit '79eae0ad':
  Update active key backgrounds

am 701fb172: (-s ours) am 3d84b383: (-s ours) am 3305a02d: (-s ours) Import translations. DO NOT MERGE

* commit '701fb172':
  Import translations. DO NOT MERGE

* commit '3d84b383':
  Import translations. DO NOT MERGE

* commit '3305a02d':
  Import translations. DO NOT MERGE

Change-Id: I054d5673b4b3fcb9303e53c8409f3ba26226e335
Auto-generated-cl: translation import

Change-Id: I33d3e1e6dc9695ef779be31952ba4126d5233df2
Auto-generated-cl: translation import

Change-Id: I198c14a1374a0b61bf5aa3cdf013fca8260bc97f
Auto-generated-cl: translation import

Change-Id: I7fbf4df1000e05cbd5a12a95bd60d36b5eac14d9
Auto-generated-cl: translation import

Change-Id: I08aeaa3e5852008874e38ed4799ab8989759e861

Bug: 15681452
Change-Id: I05f06b35748d090a58f3524df719586093431d07

* commit '06429878':
  Add unit tests for enter key's more keys

* commit 'b506390b':
  Add shared abstract test class for action label test

* commit '2ff7865e':
  Update spacebar background for Material

* commit 'c297197b':
  Add new value "spacebar" to Key.backgroundType attribute

* commit 'ec7d6752':
  Removes "customAction" value from Key.backgroundType attribute

* commit '2a7a5740':
  Add new "keyboardTheme" <case> predicator

* commit 'f2c509a8':
  Follow up API signature change

* commit '836987c0':
  Fix depedency of debug settings

* commit '6e29bf56':
  Follow API signature change in CursorAnchorInfo

* commit '464ff7c1':
  Add unit tests for enter key's more keys

* commit 'e8e08213':
  Add shared abstract test class for action label test

* commit 'cc5050d7':
  Update spacebar background for Material

* commit '1c2cf719':
  Add new value "spacebar" to Key.backgroundType attribute

* commit '5a9c9649':
  Removes "customAction" value from Key.backgroundType attribute

* commit '0af2472a':
  Add new "keyboardTheme" <case> predicator

Bug: 15681452
Change-Id: I3070c46bb2c0cb8ccaae66eaea132b41c567e135

Bug: 15681452
Change-Id: I0ad21e6979aed1b5c8c210399c4edfd5993adbdc

Bug: 17318036
Change-Id: Iaa091b525433d56db9aca9e0301f3727ce392605

Bug: 17318036
Change-Id: Ie84438a6aa3adc14a9db603d0cd4d5e37a55d612

Bug: 17318036
Change-Id: I6a36d50ba2e69eafbb0faa049014281bd4d4ddfc

* commit '310da35c':
  Follow up API signature change