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: I9108d5b6780f887c4ae7c4283047de125e3942ef