feat(DENG-9583): Add normalized_app_id and uri_count

Author: kwindau

sql_generators/glean_usage/templates/clients_last_seen_joined.query.sql

@@ -3,8 +3,8 @@ WITH baseline AS (
     {% if app_name == "firefox_desktop" %}
       days_since_desktop_active,
     {% endif %}
-    {% if app_name != "firefox_desktop" %}
-      normalized_app_id,
+    {% if app_name not in ["firefox_desktop", "mozphab", "burnham", "firefox_desktop_background_update"] %}
+      baseline.normalized_app_id,
     {% endif %}
     days_since_seen,
     days_since_active,