Add Posix tests for sockets #15634

Job	Run time
raspi-2 / initialize	45s
raspi-2-skia / initialize	43s
raspi-2-skia / docker-build-image	2m 3s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	2m 20s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	10m 29s
raspi-2-skia / raspi-2-skia_debug	14m 52s
raspi-2-skia / raspi-2-skia_qa	9m 11s
raspi-2-skia / raspi-2-skia_gold	12m 21s
raspi-2 / raspi_devel	11m 37s
raspi-2 / raspi_debug	13m 57s
raspi-2 / raspi_qa	9m 9s
raspi-2 / raspi_gold	8m 55s
raspi-2 / sbversion-17_devel	11m 36s
raspi-2 / sbversion-17_debug	15m 48s
raspi-2 / sbversion-17_qa	9m 5s
raspi-2 / sbversion-17_gold	9m 19s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / raspi_on_device_0	22m 37s
raspi-2 / raspi_on_device_1	15m 23s
raspi-2 / raspi_on_device_2	18m 18s
raspi-2 / raspi_on_device_3	14m 25s
raspi-2 / raspi_on_device_4	15m 21s
raspi-2 / raspi_on_device_5	19m 25s
raspi-2 / sbversion-17_on_device_0	23m 32s
raspi-2 / sbversion-17_on_device_1	15m 17s
raspi-2 / sbversion-17_on_device_2	20m 10s
raspi-2 / sbversion-17_on_device_3	14m 17s
raspi-2 / sbversion-17_on_device_4	14m 21s
raspi-2 / sbversion-17_on_device_5	22m 21s
	5h 57m 37s

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