Bug 1842082 - Standard home screen view count telemetry (#2914)

(cherry picked from commit 04574fb)

Co-authored-by: Harrison Oglesby <oglesby.harrison@gmail.com>

fenix/app/metrics.yaml

@@ -8830,6 +8830,24 @@ home_screen:
     metadata:
       tags:
         - HomeScreen
+  standard_homepage_view_count:
+    type: counter
+    description: |
+      The number of times the standard browsing mode home screen was
+      displayed to the user. (for tile counts)
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1842082
+    data_reviews:
+      - https://github.com/mozilla-mobile/firefox-android/pull/2841
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - android-probes@mozilla.com
+      - cgordon@mozilla.com
+    expires: never
+    metadata:
+      tags:
+        - HomeScreen
   home_screen_view_count:
     type: counter
     description: |

fenix/app/src/main/java/org/mozilla/fenix/home/HomeFragment.kt

@@ -525,6 +525,9 @@ class HomeFragment : Fragment() {
         super.onViewCreated(view, savedInstanceState)
         HomeScreen.homeScreenDisplayed.record(NoExtras())
         HomeScreen.homeScreenViewCount.add()
+        if (!browsingModeManager.mode.isPrivate) {
+            HomeScreen.standardHomepageViewCount.add()
+        }
 
         observeSearchEngineNameChanges()
         observeWallpaperUpdates()