Doc update: clarify version of flags.
Doc update: clarify version of flags.

Fixes:

b/11999080

Change-Id: I0eda86d5162caab6809ff780387091544530dc32

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