Merge "Use category icon for pending conversation widgets" into sc-dev am: d35dcdec05 am: 47c3cb02d5 am: ee7a10c8b8

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

Change-Id: Iff0060082161c13db308f39ec45562c0c29da9bc