MediaSync: fix API comments.
MediaSync: fix API comments.

Bug: 23008551

Change-Id: Ifbf1970c174b54a761d4672d954ee5633adbf3d6

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