Dichiara la fotocamera di sistema nelle queries del manifest

Da Android 11 un'app vede le altre app installate solo se le dichiara in
<queries>. Senza l'intent IMAGE_CAPTURE, MediaPicker.CapturePhotoAsync non
trovava la fotocamera di sistema e falliva con "Either there was no camera
on the device or 'android.media.action.IMAGE_CAPTURE' was not added to the
<queries> element" (segnalato su Sentry).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

SteUp.Maui/Platforms/Android/AndroidManifest.xml

@@ -25,4 +25,11 @@
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
     <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
     <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
+
+    <!-- Android 11+: rende visibile l'app fotocamera di sistema a MediaPicker -->
+    <queries>
+        <intent>
+            <action android:name="android.media.action.IMAGE_CAPTURE" />
+        </intent>
+    </queries>
 </manifest>