Add new metadata_sync table to facilitate android contacts backup.

This new metadata_sync table will cache the meta data on raw contacts
level from server before they are merged into other CP2 tables.
The data column is the blob column containing all the
backed up metadata for this raw_contact. This table should only be
used by metadata sync adapter.

Bug: 18930508
Change-Id: Iacafe812ed1fbb39b48331b6da56a35ac8f129dd
1 file changed