[automerge] Add Overlayable.xml file to car-media-common 2p: 126df91453

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Car/libs/+/16723603

Bug: 197989457
Change-Id: I64de36e0d8666e6517000abde1d149df657afea4