Delegate Taskbar touches to nearest view to ensure 48x48dp touch size am: b11e4d517d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13452498

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8cf307cd734b36889ff1d1e99c28bca8bbbcaa73