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