Call initWithLaunchOptions under registerWithRegistrar

* Fix open handler not called on cold start

Author: Jeasmine

ios/Classes/OneSignalPlugin.m

@@ -77,6 +77,7 @@ + (instancetype)sharedInstance {
 #pragma mark FlutterPlugin
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
 
+    [OneSignal initWithLaunchOptions:nil];
     [OneSignal setMSDKType:@"flutter"];
 
     // Wrapper SDK's call init with no app ID early on in the
@@ -153,7 +154,6 @@ - (void)setAppId:(FlutterMethodCall *)call withResult:(FlutterResult)result {
          [self handleInAppMessageClicked:action];
      }];
 
-    [OneSignal initWithLaunchOptions:nil];
     [OneSignal setAppId:call.arguments[@"appId"]];
 
     // If the user has required privacy consent, the SDK will not
@@ -292,7 +292,6 @@ - (void)removeExternalUserId:(FlutterMethodCall *)call withResult:(FlutterResult
 
 - (void)initNotificationOpenedHandlerParams {
     [OneSignal setNotificationOpenedHandler:^(OSNotificationOpenedResult * _Nonnull result) {
-        [OneSignal onesignalLog:ONE_S_LL_VERBOSE message:@"setNotificationOpenedHandler called from addObservers"];
         [OneSignalPlugin.sharedInstance handleNotificationOpened:result];
     }];
 }