Merge "Add metrics for taskbar 3 button nav" into tm-dev am: c8b2fdbc6a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17387076

Change-Id: Ife7ff1b9c013cba3db23a8d1997781575c9fbad1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>