[automerger skipped] Merge "Add placeholder when media control title is blank" into tm-dev am: dfc4955cbd am: b809607278 -s ours am: 58154a8064 -s ours

am skip reason: Merged-In Ie406c180af48653595e8e222a15b4dda27de2e0e with SHA-1 965e514614 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23502366

Change-Id: Ie1e072385ab7a5a7ea801e656d9d8edd20fa3397
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>