transcoder: fix rotation handling

Transfer rotation degree from source format to track format
for MediaSampleWriter, and setOrietationHint on the muxer.
During transcoding using encoder/decoder, clear the rotation
degree so that the codec is guaranted to operate non-rotated.

bug: 154734285
bug: 159649977
bug: 152091443

test: unit testing (updated test with rotation)

Change-Id: I7e829ef777b1954d894411e8591a5e31ff36e275
diff --git a/media/libmediatranscoding/transcoder/tests/MediaSampleWriterTests.cpp b/media/libmediatranscoding/transcoder/tests/MediaSampleWriterTests.cpp
index 9ffb32b..98813e7 100644
--- a/media/libmediatranscoding/transcoder/tests/MediaSampleWriterTests.cpp
+++ b/media/libmediatranscoding/transcoder/tests/MediaSampleWriterTests.cpp
@@ -58,7 +58,7 @@
 class TestMuxer : public MediaSampleWriterMuxerInterface {
 public:
     // MuxerInterface
-    ssize_t addTrack(const AMediaFormat* trackFormat) override {
+    ssize_t addTrack(AMediaFormat* trackFormat) override {
         mEventQueue.push_back(AddTrack(trackFormat));
         return mTrackCount++;
     }