feat: prioritize Bluetooth sensor data over GPS

- Restructured sensor logic to give absolute priority to Bluetooth sensors, largely ignoring GPS data for distance and speed calculations.
- Implemented downstream UI expansions, custom recording layouts, and new settings to reflect and control the new sensor-first flow.
- Added MediaNotificationListenerService and integrated media playback tracking within statistics.
- Modified VoiceAnnouncementUtils to harmonize announcements with the updated architecture.
- Added 'About This Fork' section to the README.

Note: These modifications were co-created with Antigravity AI.

src/main/AndroidManifest.xml

@@ -421,6 +421,16 @@ limitations under the License.
             android:icon="@drawable/ic_logo_color_24dp"
             android:label="@string/recording_service" />
 
+        <service
+            android:name=".services.MediaNotificationListenerService"
+            android:label="@string/app_name"
+            android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.service.notification.NotificationListenerService" />
+            </intent-filter>
+        </service>
+
         <!--Necessary for SDK < 33 to (re-)store per app locale information-->
         <service
             android:name="androidx.appcompat.app.AppLocalesMetadataHolderService"