Clean up a STOPSHIP string

    <!--  Title for Default Phone app settings [CHAR LIMIT=30] -->

    <string name="default_phone_title">Phone app</string>

    <!--

     ~ STOPSHIP(b/110557011): Remove once the new UI is ready.

     -->

    <!-- Title for Roles settings [CHAR LIMIT=30] -->

    <string name="roles_title">Roles</string>

    <!-- Label of default app for current setting [CHAR LIMIT=40] -->

    <string name="default_app">(Default)</string>