Move from sysmem.Allocator to sysmem2.Allocator. #14988

Job	Run time
android-arm / initialize	50s
android-arm64 / initialize	44s
android-x86 / initialize	46s
android-arm64 / docker-build-image	1m 40s
android-arm64 / docker-unittest-image	0s
android-x86 / docker-build-image	1m 37s
android-x86 / docker-unittest-image	0s
android-arm / docker-build-image	1m 45s
android-arm / docker-unittest-image	0s
android-x86 / x86_devel	16m 34s
android-x86 / x86_debug	16m 9s
android-x86 / x86_qa	8m 48s
android-x86 / x86_gold	9m 8s
android-arm64 / arm64_devel	16m 40s
android-arm64 / arm64_debug	16m 25s
android-arm64 / arm64_qa	9m 6s
android-arm64 / arm64_gold	8m 58s
android-arm / arm_devel	16m 51s
android-arm / arm_debug	16m 10s
android-arm / arm_qa	8m 45s
android-arm / arm_gold	9m 25s
android-x86 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-x86 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
android-arm64 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm64 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
android-arm / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
upload-release-artifacts	11s
	2h 40m 32s

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