Merge "IBinder.transact: clarify return"

     *

     * @return Returns the result from {@link Binder#onTransact}.  A successful call

     * generally returns true; false generally means the transaction code was not

     * understood.

     * understood.  For a oneway call to a different process false should never be

     * returned.  If a oneway call is made to code in the same process (usually to

     * a C++ or Rust implementation), then there are no oneway semantics, and

     * false can still be returned.

     */

    public boolean transact(int code, @NonNull Parcel data, @Nullable Parcel reply, int flags)

        throws RemoteException;