Merge "Guard against native crash due to null Surface" into pi-dev

    sp<PersistentSurface> persistentSurface =

        android_media_MediaCodec_getPersistentInputSurface(env, object);

    if (persistentSurface == NULL) {

        throwExceptionAsNecessary(

                env, BAD_VALUE, ACTION_CODE_FATAL, "input surface not valid");

        return;

    }

    status_t err = codec->setInputSurface(persistentSurface);

    if (err != NO_ERROR) {

        throwExceptionAsNecessary(env, err);