Support posting delayed animation/draw callbacks.
Support posting delayed animation/draw callbacks.

This is especially useful for slow animations such as blinking the
cursor, which only needs to happen after a certain amount of time
has elapsed.

Change-Id: If1163a3480078c75d6461eb8f96d8bf8b625534f

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