Bug 1884006 - Add telemetry for media control usage on uikit. r=media-playback-reviewers,alwu

Differential Revision: https://phabricator.services.mozilla.com/D203834

Author: glandium

dom/media/mediacontrol/MediaControlService.cpp

@@ -157,6 +157,10 @@ void MediaControlService::NotifyMediaControlHasEverBeenUsed() {
   Telemetry::ScalarSet(Telemetry::ScalarID::MEDIA_CONTROL_PLATFORM_USAGE,
                        u"Android"_ns, usedOnMediaControl);
 #endif
+#ifdef MOZ_WIDGET_UIKIT
+  Telemetry::ScalarSet(Telemetry::ScalarID::MEDIA_CONTROL_PLATFORM_USAGE,
+                       u"iOS"_ns, usedOnMediaControl);
+#endif
 }
 
 void MediaControlService::NotifyMediaControlHasEverBeenEnabled() {
@@ -182,6 +186,10 @@ void MediaControlService::NotifyMediaControlHasEverBeenEnabled() {
   Telemetry::ScalarSet(Telemetry::ScalarID::MEDIA_CONTROL_PLATFORM_USAGE,
                        u"Android"_ns, enableOnMediaControl);
 #endif
+#ifdef MOZ_WIDGET_UIKIT
+  Telemetry::ScalarSet(Telemetry::ScalarID::MEDIA_CONTROL_PLATFORM_USAGE,
+                       u"iOS"_ns, enableOnMediaControl);
+#endif
 }
 
 NS_IMETHODIMP