fix(ft8): remove application tag from module manifest (merge conflict)

feature/ft8 module manifest carried an application element from the
FT8CN standalone app (allowBackup/icon/label/usesCleartextTraffic),
clashing with the main app manifest at merge (allowBackup false vs
true, icon, label). Removed the tag - components (activities, service,
permissions) remain and merge cleanly. Verified: processRelease-
MainManifest + mergeReleaseResources BUILD SUCCESSFUL.

feature/ft8/src/main/AndroidManifest.xml

@@ -19,6 +19,7 @@
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
 
+    <application>
         <activity
             android:name=".grid_tracker.GridTrackerMainActivity"
             android:screenOrientation="sensorLandscape"
@@ -78,4 +79,5 @@
         </provider>
 
 
+    </application>
 </manifest>