Update Starboard media header description #11245

Job	Run time
raspi-2 / initialize	46s
raspi-2-skia / initialize	43s
raspi-2-skia / docker-build-image	1m 14s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	1m 8s
raspi-2 / docker-unittest-image	0s
raspi-2 / raspi_devel	9m 26s
raspi-2 / raspi_debug	11m 48s
raspi-2 / raspi_qa	7m 34s
raspi-2 / raspi_gold	7m 16s
raspi-2 / sbversion-15_devel	9m 5s
raspi-2 / sbversion-15_debug	11m 41s
raspi-2 / sbversion-15_qa	8m 52s
raspi-2 / sbversion-15_gold	8m 13s
raspi-2-skia / raspi-2-skia_devel	9m 18s
raspi-2-skia / raspi-2-skia_debug	12m 22s
raspi-2-skia / raspi-2-skia_qa	8m 20s
raspi-2-skia / raspi-2-skia_gold	7m 36s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
	1h 55m 22s

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