Merge "Folder preview polish." into sc-dev am: 65c20f4a91 am: b0cb17aa95 am: d00ab6057f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14912724

Change-Id: I0d8c3fe0218286d3c6528da8a5074c6445c5629f