Bugfix: crash on voice announcement if using imperial with meters

Fixes #1626

src/androidTest/java/de/dennisguse/opentracks/services/announcement/VoiceAnnouncementUtilsTest.java

@@ -207,6 +207,20 @@ public class VoiceAnnouncementUtilsTest {
         assertEquals("Total distance 1.1 miles. 1 hour. Average moving speed 1.1 miles per hour.", announcement);
     }
 
+    @Test
+    public void getAnnouncement_imperial_meter_speed_1() {
+        TrackStatistics stats = new TrackStatistics();
+        stats.setTotalDistance(Distance.ofMile(1.1));
+        stats.setTotalTime(Duration.ofHours(2).plusMinutes(5).plusSeconds(10));
+        stats.setMovingTime(Duration.ofHours(1));
+
+        // when
+        String announcement = VoiceAnnouncementUtils.getAnnouncement(context, stats, UnitSystem.IMPERIAL_METER, true, null, null).toString();
+
+        // then
+        assertEquals("Total distance 1.1 miles. 1 hour. Average moving speed 1.1 miles per hour.", announcement);
+    }
+
     @Test
     public void getAnnouncement_metric_speed_1() {
         TrackStatistics stats = new TrackStatistics();

src/main/java/de/dennisguse/opentracks/services/announcement/VoiceAnnouncementUtils.java

@@ -52,7 +52,7 @@ class VoiceAnnouncementUtils {
                 unitDistanceTTS = "kilometer";
                 unitSpeedTTS = "kilometer per hour";
             }
-            case IMPERIAL_FEET -> {
+            case IMPERIAL_FEET, IMPERIAL_METER -> {
                 perUnitStringId = R.string.voice_per_mile;
                 distanceId = R.string.voiceDistanceMilesPlural;
                 speedId = R.string.voiceSpeedMilesPerHourPlural;