Rename the WF Setting name to be more exact

Note: We are adding Wear settings to the backup list as per ag/17916603, hence no changes are needed in SettingsBackupTest seen in the CL from which this is CPed.

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19121813



Change-Id: Ia307e57c6b162d6c2ce671302ddb77660328502d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
Bug: 222022449