Fix for time and unit announcements (#2166)

Bugfix: time and unit announcement where not configurable correctly.

Fixes #2165.

Reviewed-on: https://codeberg.org/OpenTracksApp/OpenTracks/pulls/2166
Co-authored-by: Rob Herremans <dev@robherremans.nl>
Co-committed-by: Rob Herremans <dev@robherremans.nl>

src/main/res/values/do_not_translate.xml

@@ -44,6 +44,7 @@ limitations under the License.
     <string name="sensor_unit_power" translatable="false">w</string>
 
     <string name="value_unknown" translatable="false">-</string>
+    <string name="empty" translatable="false"></string>
     <string name="report_issue_link" translatable="false">https://codeberg.org/OpenTracksApp/OpenTracks/issues/new?labels=bug&amp;template=bug_report.md&amp;body=%1$s</string>
 
     <string-array name="marker_types">

src/main/res/values/strings.xml

@@ -14,7 +14,6 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 --><resources>
-    <string name="empty">empty</string>
     <string name="about_preference_title">About</string>
     <string name="about_description"><i>OpenTracks</i> is a sport tracking application that completely respects your privacy.</string>
     <string name="about_url">Project webpage: <a href="%1$s">%1$s</a></string>