Launch `HTMLMediaElement.buffered` optimization #1241

Job	Run time
raspi-2 / initialize	41s
raspi-2-skia / initialize	46s
raspi-2 / docker-build-image	2m 5s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / docker-build-image	2m 4s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / raspi_devel	11m 18s
raspi-2 / raspi_debug	15m 8s
raspi-2 / raspi_qa	10m 1s
raspi-2 / raspi_gold	9m 36s
raspi-2 / sbversion-15_devel	12m 40s
raspi-2 / sbversion-15_debug	15m 34s
raspi-2 / sbversion-15_qa	9m 59s
raspi-2 / sbversion-15_gold	11m 37s
raspi-2 / sbversion-16_devel	11m 22s
raspi-2 / sbversion-16_debug	15m 6s
raspi-2 / sbversion-16_qa	10m 7s
raspi-2 / sbversion-16_gold	9m 31s
raspi-2-skia / raspi-2-skia_devel	12m 44s
raspi-2-skia / raspi-2-skia_debug	15m 43s
raspi-2-skia / raspi-2-skia_qa	10m 6s
raspi-2-skia / raspi-2-skia_gold	10m 20s
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
	3h 16m 28s

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