Merge "Call listener onConnected method when connection starts." into ub-launcher3-master am: 9c6946dd92 am: 44fcd0ae8f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/11803803

Change-Id: I9a5287d296823925be78e484c28ab5b3a176ba2a