Merge "TCMS: Trust the package name for requests by the system."

        if (packageName == null) return;

        try {

            final int uid = context.getPackageManager()

            final int packageUid = context.getPackageManager()

                    .getPackageUidAsUser(packageName, UserHandle.getCallingUserId());

            Preconditions.checkArgument(Binder.getCallingUid() == uid);

            final int callingUid = Binder.getCallingUid();

            Preconditions.checkArgument(callingUid == packageUid

                    // Trust the system process:

                    || callingUid == android.os.Process.SYSTEM_UID);

        } catch (Exception e) {

            throw new RemoteException(

                    String.format("Invalid package: name=%s, error=%s", packageName, e));