[automerger skipped] Make CentralSurfaces an Interface. am: ee483863 am: 4ac82f1d -s ours am: 5b6c04ab -s ours

am skip reason: Merged-In Iab41b70e0c65d75560010d961dcb52a11fd237f5 with SHA-1 fbd069e3 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17756836



Change-Id: Icb3509fff1fb64c1b71a539831ad1d679794a786
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>