Fix PC Qwerty layout

This CL fixes:
 - Action label never displayed on phone.
 - Go action label incorrectly showed on tablet.
 - Broken layout on noMicrophoneKey+noSettingsKey input field.
 - "Voice input key" settings has no effect on phone.
 - Inconsistent microphone and emoji key layouts.
 - Slightly modified spacebar size when language switch key is on.
 - Slightly larger enter key on tablet.

Bug: 13537661
Change-Id: I69a6ee7bc99e84b104a4d0352e1824096f6a4750