Merge "Use category icon for pending conversation widgets" into sc-dev am: d35dcdec05 am: 755c2c54c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15142493

Change-Id: I9335b1cc77c2fcce344cba996cd097c5898c28fc