Add MetadataSync table to ContactsContract.
Add MetadataSync table to ContactsContract.

Sync adapter will modify MetadataSync table to cache the metadata_sync
data from server before it is merged into other CP2 tables.

BUG 20055193

Change-Id: I19d31fc19204444432212cc14c9650d41e075648

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