Update javadoc for flags
Update javadoc for flags

Bug: 25997037
Change-Id: Ia44634b0271ad0195d857ef13afec2a1ef022fae

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