Merge "Fix clearApplicationUserData() to allow a null observer" into klp-dev

        Parcel reply = Parcel.obtain();

        data.writeInterfaceToken(IActivityManager.descriptor);

        data.writeString(packageName);

        data.writeStrongBinder(observer.asBinder());

        data.writeStrongBinder((observer != null) ? observer.asBinder() : null);

        data.writeInt(userId);

        mRemote.transact(CLEAR_APP_DATA_TRANSACTION, data, reply, 0);

        reply.readException();