Update AGP to 8.8 #27213

Job	Run time
build-cfg	1s
android-test-gmd-cfg	1s
android-test-gmd-cfg-check	1s
build-cfg-check	1s
android-test-gmd (23, aosp, nexus4)	18m 40s
android-test-gmd (30, wear, wearoslargeround)	31m 11s
android-test-gmd (34, aosp, pixel2)	18m 23s
build (21)	23m 29s
build (35)	14m 9s
codecov-device-test-upload (23, aosp, nexus4)	7s
codecov-device-test-upload (34, aosp, pixel2)	6s
codecov-device-test-upload (30, wear, wearoslargeround)	4s
codecov-device-coverage-upload	0s
codecov-unit-coverage-upload (21)	9s
codecov-unit-coverage-upload (35)	4s
codecov-unit-test-upload (21)	10s
codecov-unit-test-upload (35)	4s
	1h 46m 40s

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