[android] Refactor media_session_client #9998

Job	Run time
raspi-2 / initialize	41s
raspi-2-skia / initialize	37s
raspi-2-skia / docker-build-image	1m 13s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	1m 13s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	8m 2s
raspi-2-skia / raspi-2-skia_debug	13m 4s
raspi-2-skia / raspi-2-skia_qa	7m 20s
raspi-2-skia / raspi-2-skia_gold	7m 2s
raspi-2 / raspi_devel	8m 10s
raspi-2 / raspi_debug	12m 49s
raspi-2 / raspi_qa	7m 0s
raspi-2 / raspi_gold	6m 34s
raspi-2 / sbversion-15_devel	8m 5s
raspi-2 / sbversion-15_debug	11m 59s
raspi-2 / sbversion-15_qa	7m 27s
raspi-2 / sbversion-15_gold	7m 48s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
	1h 49m 4s

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