'Beta' tag for themed icon toggle am: dec7880032 am: 6a5e3dbfeb am: 75fab0c85d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/15185264

Change-Id: I35e09dc022f0d061f5d0f28a2567c14edf8188d0