Update AppCompat to depend on stable emoji2
Update AppCompat to depend on stable emoji2

emoji2 1.2.0 has been released and the prebuilts are available so we
should move AppCompat from the rc to the stable version.

Test: ./gradlew bOS
Change-Id: Iec359fc8e30ac8158187e5c162c32577ccf16308

androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx