Prevent writing EOS blocks into MediaMuxer

Android 11 stops automatically when it receives
one. This commit has been copied from
https://github.com/natario1/Transcoder/pull/108

Author: NiekAkerboom

lib/src/main/java/com/otaliastudios/transcoder/transcode/BaseTrackTranscoder.java

@@ -278,7 +278,8 @@ private int drainEncoder(long timeoutUs) {
 
         if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
             mIsEncoderEOS = true;
-            mBufferInfo.set(0, 0, 0, mBufferInfo.flags);
+            mEncoder.releaseOutputBuffer(result, false);
+            return DRAIN_STATE_NONE;
         }
         if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
             // SPS or PPS, which should be passed by MediaFormat.

lib/src/main/java/com/otaliastudios/transcoder/transcode/PassThroughTrackTranscoder.java

@@ -69,8 +69,6 @@ public boolean transcode(boolean forceInputEos) {
         }
         if (mDataSource.isDrained() || forceInputEos) {
             mDataChunk.buffer.clear();
-            mBufferInfo.set(0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
-            mDataSink.writeTrack(mTrackType, mDataChunk.buffer, mBufferInfo);
             mIsEOS = true;
             return true;
         }