Merge "Space out 3 button nav on taskbar" into tm-qpr-dev am: 5e6fe328 am: 2a8906bf

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/19272533



Change-Id: I2ea492fac54d0fabf1af92500e2ad102855c4c79
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>