Clarify FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET usage
Clarify FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET usage

Fixes bug 12592453.

Change-Id: Ib64559727d59b3433c3753f9fda88329effc7e26

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