Release Xamarin.Firebase.AppIndexing with net6.0-android for AndroidX dependency. (#515)

Author: jpobst

config.json

@@ -581,7 +581,7 @@
         "groupId": "com.google.firebase",
         "artifactId": "firebase-appindexing",
         "version": "20.0.0",
-        "nugetVersion": "120.0.0.1",
+        "nugetVersion": "120.0.0.2",
         "nugetId": "Xamarin.Firebase.AppIndexing",
         "dependencyOnly": false
       },