requested storage permission

android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
     <application
         android:label="maps_bookmarks"
         android:name="${applicationName}"