Fix storage permissions in debug manifest too

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

src/debug/AndroidManifest.xml

@@ -5,7 +5,11 @@
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
 
     <!-- Allows for storing and retrieving screenshots -->
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="29"
+        tools:ignore="ScopedStorage" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
 
     <!-- Allows changing locales -->