Crash observed when attempted to uncheck the Accessibility option.
Crash observed when attempted to uncheck the Accessibility option.

1. Accessibility events for change in the window content are sent
   with a delay and code performing the send does not check the
   accessibilitys state before sending the event.

bug:4980754

Change-Id: Ice68037ebab9c5dcd0dece927765585e13959c0c

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