Merge "Update widget edit icon to use material colors." into tm-dev am: 37edea679c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17656215

Change-Id: Ic5465a476cd9f3f42ae931c2b65a9910eb04e4a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>