🔧 [Android] Add WRITE_EXTERNAL_STORAGE to the example

Author: AlexV525

example/android/app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
     package="com.fluttercandies.wechatAssetsPickerExample">
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
     <application
         android:label="Wechat Assets Picker Example"