Merge "Load clipboard image thumbnail in background" into tm-qpr-dev am: a4d84996

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21675231



Change-Id: I498bcde8a60970d19c70e1bb666c063c2a00158a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>