Clarify that flush does not necessarily free up buffer space
Clarify that flush does not necessarily free up buffer space

Change-Id: I6f77efb6a8da5e11c0cc68f0bb3ce47a0c1cb3da

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