Merge "fix(magnification thumbnail): pretty up the thumbnail for better visibility" into udc-dev am: ffc35a3e am: b6b15818

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22083582



Change-Id: Ib2cf68ae2102fc9b3d5da4aebe8269fd8d679f71
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>