Fix AppCompat Gradle build
Fix AppCompat Gradle build

AppCompat now uses AVDC, which has a greater min sdk than
AppCompat. We needed to add an overrideLibrary tag to make
the manifest merger happy.

Change-Id: I6a1d8bdacf65fd9d43ec77d1d924d1a043a36c8d

aosp-mirror/platform_frameworks_support,AndroidX/androidx,aosp-mirror/platform_frameworks_support,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,aosp-mirror/platform_frameworks_support,androidx/androidx,AndroidX/androidx,aosp-mirror/platform_frameworks_support,aosp-mirror/platform_frameworks_support,androidx/androidx,androidx/androidx,AndroidX/androidx