API Review: Add @IntDef and other annotations to Menu Item flags.
API Review: Add @IntDef and other annotations to Menu Item flags.

BUG: 28296254
Change-Id: I11f77ae36b24f97948f55887d2ba111220afcf80

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