This change also moves KeyboardSwitcher and related classes to
com.android.inputmethod.keyboard package.
Multi project change with Ib23017b2
Change-Id: Id7d54b24615fe22ebb540ca847549909e346ee24
This change introduces new package com.android.inputmethod.keyboard
which hosts keyboard related classes.
Also adds missing @Override and @SuppressWarning("unused") annotation
Change-Id: I0317f5cfa317e13f3c77815f48ffc69b5d1ade05