Garmin: enable unicode Emoji for all devices

This seems to be widely supported by garmin devices, hence enable it in the base coordinator. Specific devices not supporting Unicode Emojis can override this method and return false.

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/garmin/GarminCoordinator.java

@@ -87,4 +87,9 @@ public abstract class GarminCoordinator extends AbstractBLEDeviceCoordinator {
     protected static Prefs getPrefs(final GBDevice device) {
         return new Prefs(GBApplication.getDeviceSpecificSharedPrefs(device.getAddress()));
     }
+
+    @Override
+    public boolean supportsUnicodeEmojis() {
+        return true;
+    }
 }