Merge "Set elevation of popup and arrow to match. This ensures no shadow overlap." into sc-dev am: 26a485bb2a am: 9e6bc67ad2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15147164

Change-Id: Ifd504a1f7de5fbe7e04428dbb3703850c9043af0