Preference: "GPS disabled"-warning is now configurable.

Fixes #2058.

src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java

@@ -390,6 +390,10 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
             return;
         }
 
+        if (!PreferencesUtils.shouldShowGpsDisabledWarning()) {
+            return;
+        }
+
         snackbar = Snackbar
                 .make(viewBinding.trackRecordingCoordinatorLayout,
                         getString(R.string.gps_recording_status, getString(gpsStatusValue.message), getString(R.string.gps_recording_without_signal)),

src/main/java/de/dennisguse/opentracks/settings/PreferencesUtils.java

@@ -318,6 +318,11 @@ public class PreferencesUtils {
         return getBoolean(R.string.stats_fullscreen_while_recording_key, DEFAULT);
     }
 
+    public static boolean shouldShowGpsDisabledWarning() {
+        final boolean DEFAULT = resources.getBoolean(R.bool.stats_show_gps_disabled_warnings_default);
+        return getBoolean(R.string.stats_show_gps_disabled_warnings_key, DEFAULT);
+    }
+
     public static boolean shouldShowElevation() {
         final boolean DEFAULT = resources.getBoolean(R.bool.chart_display_elevation_default);
         return getBoolean(R.string.chart_display_elevation_key, DEFAULT);