Merge "Add widget flag in CoreSettingObserver" into udc-qpr-dev am: 9dc442bff2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24360625

Change-Id: Ib3ca3820f43e34c2c1fb24bd48c7e5fb10749ee5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>