Add FXIOS-10904 Focus iOS: Send data deletion request when DAU ping is toggled off

focus-ios/Blockzilla/AppDelegate.swift

@@ -358,6 +358,8 @@ extension AppDelegate {
             }
         }
 
+        GleanMetrics.Pings.shared.usageDeletionRequest.setEnabled(enabled: true)
+
         if TelemetryManager.shared.isGleanEnabled {
             UsageProfileManager.checkAndSetUsageProfileId()
         } else {
@@ -371,6 +373,7 @@ extension AppDelegate {
             channel: channel,
             pingSchedule: ["baseline": ["usage-reporting"]]
         )
+
         Glean.shared.initialize(
             uploadEnabled: TelemetryManager.shared.isGleanEnabled,
             configuration: configuration,

focus-ios/Blockzilla/Settings/Controller/SettingsViewController.swift

@@ -656,7 +656,9 @@ class SettingsViewController: UIViewController, UITableViewDataSource, UITableVi
         } else if toggle.setting == .biometricLogin {
             TipManager.biometricTip = false
         } else if toggle.setting == .dailyUsagePing {
-            // TODO: FXIOS-10904 Focus iOS: Send data deletion request when DAU ping is toggled off
+            if !sender.isOn {
+                GleanMetrics.Pings.shared.usageDeletionRequest.submit()
+            }
         }
 
         switch toggle.setting {

focus-ios/Blockzilla/pings.yaml

@@ -51,3 +51,26 @@ usage-reporting:
     include_info_sections: false
     ping_schedule:
       - baseline
+
+usage-deletion-request:
+  description: |
+    This ping is submitted when a user opts out of sending usage
+    frequency of Firefox to Mozilla.
+    Sent in response to user action.
+  include_client_id: false
+  send_if_empty: true
+  bugs:
+    - https://mozilla-hub.atlassian.net/browse/FXIOS-10904
+  data_reviews:
+    - https://github.com/mozilla-mobile/firefox-ios/pull/24339
+  notification_emails:
+    - [email protected]
+    - [email protected]
+    - [email protected]
+  metadata:
+    follows_collection_enabled: false
+    include_info_sections: false
+  reasons:
+    set_upload_enabled: |
+      The ping was submitted due to the usage-reporting data preference changing from
+      enabled to disabled.