include mobile apps in MAU reporting

Leadership has requested that MAU reporting include the Mobile KPI apps in addition to Firefox Desktop. MAU should match the ["Combined MAU (Desktop + Mobile)" graph](https://mozilla.cloud.looker.com/dashboards/1178#mau) reported on our internal Looker dashboards.

Author: bochocki

sql/moz-fx-data-shared-prod/telemetry_derived/public_data_report_user_activity_v1/query.sql

@@ -50,7 +50,7 @@ active_users_aggregates AS (
     ON cn.code = country_group
   WHERE
     submission_date = @submission_date
-    AND app_name = 'Firefox Desktop'
+    AND app_name IN ('Firefox Desktop', 'Fenix', 'Firefox iOS', 'Focus Android', 'Focus iOS')
 ),
 sample_addons AS (
   SELECT