Update AOSP DialerPrebuilt am: 7ef70607b4 am: 9586fa7c15

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Car/DialerPrebuilt/+/23784421

Change-Id: I85d0115a4b8b8c5c21c1dde63a2e2e563b25ef00
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>