Properly handle navigation keys in TIS
Properly handle navigation keys in TIS

If the navigation keys are dispatched to an overlay view and
the overlay view has focusable views, the navigation keys should
be always handled.

Bug: 15174809
Change-Id: Ia7490880243342e08e4502644e1864e4c583ee1d

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base