For #5094: Adds telemetry for suggestion toggles (#5704)

app/metrics.yaml

@@ -107,13 +107,16 @@ events:
     extra_keys:
       preference_key:
         description: "The preference key for the switch preference the user toggled. We currently track:
-          show_search_suggestions, remote_debugging, telemetry, tracking_protection"
+          show_search_suggestions, remote_debugging, telemetry, tracking_protection, search_bookmarks,
+          search_browsing_history, and show_clipboard_suggestions"
       enabled:
         description: "Whether or not the preference is *now* enabled"
     bugs:
     - 975
+    - 5094
     data_reviews:
     - https://github.com/mozilla-mobile/fenix/pull/1896
+    - https://github.com/mozilla-mobile/fenix/pull/5704
     notification_emails:
     - fenix-core@mozilla.com
     expires: "2020-03-01"

app/src/main/java/org/mozilla/fenix/components/metrics/Metrics.kt

@@ -134,7 +134,10 @@ sealed class Event {
             context.getString(R.string.pref_key_show_search_suggestions),
             context.getString(R.string.pref_key_remote_debugging),
             context.getString(R.string.pref_key_telemetry),
-            context.getString(R.string.pref_key_tracking_protection)
+            context.getString(R.string.pref_key_tracking_protection),
+            context.getString(R.string.pref_key_search_bookmarks),
+            context.getString(R.string.pref_key_search_browsing_history),
+            context.getString(R.string.pref_key_show_clipboard_suggestions)
         )
 
         override val extras: Map<Events.preferenceToggledKeys, String>?