Merge changes from topic "launcher_at_least_oreo" into ub-launcher3-master

* changes:
  [automerger] WallpaperManagerCompat should target correct platform Also replace Utilities.isAtLeastO() to static final constant. Bug: 65544683 am: e24cb63b81
  WallpaperManagerCompat should target correct platform Also replace Utilities.isAtLeastO() to static final constant. Bug: 65544683