Add posix compliance test for sscanf. #15142

Job	Run time
android-arm64 / initialize	50s
android-arm / initialize	50s
android-x86 / initialize	46s
android-x86 / docker-build-image	1m 46s
android-x86 / docker-unittest-image	0s
android-arm64 / docker-build-image	1m 37s
android-arm64 / docker-unittest-image	0s
android-arm / docker-build-image	1m 41s
android-arm / docker-unittest-image	0s
android-arm64 / arm64_devel	21m 57s
android-arm64 / arm64_debug	16m 39s
android-arm64 / arm64_qa	11m 12s
android-arm64 / arm64_gold	10m 2s
android-arm / arm_devel	19m 21s
android-arm / arm_debug	16m 54s
android-arm / arm_qa	8m 59s
android-arm / arm_gold	9m 59s
android-x86 / x86_devel	17m 20s
android-x86 / x86_debug	16m 23s
android-x86 / x86_qa	9m 16s
android-x86 / x86_gold	9m 18s
android-x86 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-x86 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
android-arm / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm / arm_on_device_0	22m 11s
android-arm / arm_on_device_1	12m 6s
android-arm / arm_on_device_2	28m 17s
android-arm / arm_on_device_3	19m 46s
android-arm / arm_on_device_black_box_test	18m 12s
android-arm64 / arm64_on_device_0	17m 10s
android-arm64 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm64 / arm64_on_device_1	11m 7s
android-arm64 / arm64_on_device_2	29m 16s
android-arm64 / arm64_on_device_3	16m 12s
android-arm64 / arm64_on_device_black_box_test	5m 2s
upload-release-artifacts	0s
	5h 54m 9s

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