RMS: Pass in rollback_id in the calls to installd

- snapshotAppData gets PackageRollbackInfo and updates pending backups
  and inodes of CE user data snapshots;
- computePendingBackups/Restores is now merged into
  commitPendingBackupAndRestoreForUser;
- essentially commitPendingBackupAndRestoreForUser now gets lists of
  pending and recently executed rollbacks, computs what backups and
  restores are pending and commits them.

Bug: 124029909
Test: RollbackTest, AppDataRollbackHelperTest
Change-Id: I5aecdfd47b535492165614ee7cf9676778e292ad