Merge "launcher: use correct preference key on SettingsChangeLogger" into sc-v2-dev am: c7c1ea8ac8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15267298

Change-Id: Id3e54520e040b4b6d087e9dab93e3bd3d41ad6ba