[test] Clean up socket and socket_waiter headers #15648

Job	Run time
raspi-2 / initialize	46s
raspi-2-skia / initialize	50s
raspi-2 / docker-build-image	2m 39s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / docker-build-image	2m 43s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / raspi_devel	14m 16s
raspi-2 / raspi_debug	17m 52s
raspi-2 / raspi_qa	10m 58s
raspi-2 / raspi_gold	10m 32s
raspi-2 / sbversion-17_devel	14m 16s
raspi-2 / sbversion-17_debug	20m 22s
raspi-2 / sbversion-17_qa	10m 59s
raspi-2 / sbversion-17_gold	10m 39s
raspi-2-skia / raspi-2-skia_devel	14m 24s
raspi-2-skia / raspi-2-skia_debug	18m 16s
raspi-2-skia / raspi-2-skia_qa	11m 18s
raspi-2-skia / raspi-2-skia_gold	10m 56s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
	2h 51m 46s

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