Add android:exported="true" on the xml part

Author: Phenek

articles/active-directory/develop/msal-net-xamarin-android-considerations.md

@@ -75,7 +75,7 @@ protected override void OnActivityResult(int requestCode,
 To support System WebView, the *AndroidManifest.xml* file should contain the following values:
 
 ```xml
-<activity android:name="microsoft.identity.client.BrowserTabActivity" android:configChanges="orientation|screenSize">
+<activity android:name="microsoft.identity.client.BrowserTabActivity" android:configChanges="orientation|screenSize" android:exported="true">
   <intent-filter>
     <action android:name="android.intent.action.VIEW" />
     <category android:name="android.intent.category.DEFAULT" />