Merge "Sanity-check backup agent name prior to instantiation"

            try {

                mCurrentPackage = mPackageManager.getPackageInfo(request.packageName,

                        PackageManager.GET_SIGNATURES);

                if (mCurrentPackage.applicationInfo.backupAgentName == null) {

                    // The manifest has changed but we had a stale backup request pending.

                    // This won't happen again because the app won't be requesting further

                    // backups.

                    Slog.i(TAG, "Package " + request.packageName

                            + " no longer supports backup; skipping");

                    addBackupTrace("skipping - no agent, completion is noop");

                    executeNextState(BackupState.RUNNING_QUEUE);

                    return;

                }

                IBackupAgent agent = null;

                try {