Merge "Add support for dark tint on taskbar nav buttons" into sc-v2-dev am: 426b021e22 am: 7a957e914e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16250063

Change-Id: I15f08a40e4414b410a1571b97284ada43d610747