MediaPlayer2: MEDIA2_INFO_DATA_SOURCE_START is sent by native code

            @Override

            void process() {

                stayAwake(true);

                // TODO: remove this block when native code sends MEDIA_INFO_DATA_SOURCE_START

                // when pipeline is created.

                if (getState() == PLAYER_STATE_PREPARED) {

                    final DataSourceDesc dsd;

                    synchronized (mSrcLock) {

                        dsd = mCurrentDSD;

                    }

                    synchronized (mEventCbLock) {

                        for (Pair<Executor, EventCallback> cb : mEventCallbackRecords) {

                            cb.first.execute(() -> cb.second.onInfo(

                                    MediaPlayer2Impl.this, dsd, MEDIA_INFO_DATA_SOURCE_START, 0));

                        }

                    }

                }

                _start();

            }

        });