Merge "Add IDs to buttons in 3 button nav for Taskbar" into sc-v2-dev am: 3fcc02b8dc am: 7107268df9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15027506

Change-Id: I7fc65aa447ab6ca63b3e5b0ff1802ad056ab4b56