(Example app): Add support for audio messages

Author: vickz84259

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

@@ -1,6 +1,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.talkjs.flutter_push_example">
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <application
         android:usesCleartextTraffic="true"
         android:label="push_notifications"