Add tests for POSIX write. #12207

Job	Run time
android-arm / initialize	46s
android-arm64 / initialize	50s
android-x86 / initialize	44s
android-x86 / docker-build-image	1m 57s
android-x86 / docker-unittest-image	0s
android-arm / docker-build-image	1m 46s
android-arm / docker-unittest-image	0s
android-arm64 / docker-build-image	1m 54s
android-arm64 / docker-unittest-image	0s
android-arm / arm_devel	22m 28s
android-arm / arm_debug	26m 0s
android-arm / arm_qa	9m 17s
android-arm / arm_gold	8m 53s
android-arm64 / arm64_devel	23m 24s
android-arm64 / arm64_debug	19m 37s
android-arm64 / arm64_qa	9m 27s
android-arm64 / arm64_gold	9m 1s
android-x86 / x86_devel	26m 15s
android-x86 / x86_debug	20m 0s
android-x86 / x86_qa	9m 47s
android-x86 / x86_gold	9m 14s
android-arm64 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm64 / arm64_on_device_0	18m 48s
android-arm64 / arm64_on_device_1	11m 25s
android-arm64 / arm64_on_device_2	16m 44s
android-arm64 / arm64_on_device_3	8m 5s
android-arm64 / arm64_on_device_black_box_test	7m 19s
android-arm / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm / arm_on_device_0	24m 51s
android-arm / arm_on_device_1	16m 4s
android-arm / arm_on_device_2	23m 47s
android-arm / arm_on_device_3	21m 22s
android-arm / arm_on_device_black_box_test	23m 29s
android-x86 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-x86 / x86_on_device_0	1h 31m 43s
android-x86 / x86_on_device_1	19m 57s
android-x86 / x86_on_device_2	13m 50s
android-x86 / x86_on_device_3	15m 53s
android-x86 / x86_on_device_black_box_test	13m 41s
upload-release-artifacts	0s
	8h 48m 18s

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