[RESTRICT AUTOMERGE] AccessibilityManagerService: remove uninstalled services...

[RESTRICT AUTOMERGE] AccessibilityManagerService: remove uninstalled services from enabled list after service update. am: f6192d3a am: 4143b68f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/26703706



Change-Id: I049c27212066d12634cf21ed321c77edebaab2e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>