Merge "[wpp2] Adds support for a "supporting text" section in dialogs." into udc-dev am: bfe3a9debf

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/23565924

Change-Id: Ib7ee7f4c0e9e01b9bdd753770ce8f7b4f0d3b0c7
Signed-off-by: Automerger Merge Worker <[email protected]>