Analytics: add APP_OPEN event.

1Weather/Analytics/AnalyticsEvent.swift

@@ -84,4 +84,5 @@ public enum AnalyticsEvent: String {
     case ANALYTICS_A9_BID_REQUESTED = "A9_BID_REQUESTED"
     case ANALYTICS_A9_BID_RECEIVED = "A9_BID_RECEIVED"
     case ANALYTICS_AD_CLICKED = "AD_CLICKED"
+    case ANALYTICS_APP_OPEN = "APP_OPEN"
 }

1Weather/AppDelegate.swift

@@ -72,6 +72,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         MoEngage.sharedInstance().initializeLive(with: moEngageConfig, andLaunchOptions: launchOptions)
         #endif
         
+        analytics(log: .ANALYTICS_APP_OPEN)
         return true
     }