app center；增加發送ping的秒

Assets/AppCenter/Plugins/iOS/Analytics/TransmissionTarget.mm

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+#import "TransmissionTarget.h"
+#import "AppCenterAnalytics/MSACAnalyticsTransmissionTarget.h"
+#import "AppCenterAnalytics/MSACPropertyConfigurator.h"
+#import "../Core/Utility/NSStringDictionaryHelper.h"
+
+void appcenter_unity_transmission_target_track_event(MSACAnalyticsTransmissionTarget *transmission, char* eventName, int flags) {
+  [transmission trackEvent:[NSString stringWithUTF8String:eventName] withProperties:NULL flags:flags];
+}
+
+void appcenter_unity_transmission_target_track_event_with_props(MSACAnalyticsTransmissionTarget *transmission, char* eventName, char** keys, char** values, int count, int flags) {
+  NSDictionary<NSString*, NSString*> *properties = appcenter_unity_create_ns_string_dictionary(keys, values, count);
+  [transmission trackEvent:[NSString stringWithUTF8String:eventName] withProperties: properties flags:flags];
+}
+
+void appcenter_unity_transmission_target_track_event_with_typed_props(MSACAnalyticsTransmissionTarget *transmission, char* eventName, MSACEventProperties* properties, int flags) {
+  [transmission trackEvent: [NSString stringWithUTF8String:eventName] withTypedProperties:properties flags:flags];
+}
+
+void appcenter_unity_transmission_target_set_enabled(MSACAnalyticsTransmissionTarget *transmission, BOOL enabled) {
+  [transmission setEnabled: enabled];
+}
+
+BOOL appcenter_unity_transmission_target_is_enabled(MSACAnalyticsTransmissionTarget *transmission) {
+  return [transmission isEnabled];
+}
+
+MSACAnalyticsTransmissionTarget *appcenter_unity_transmission_transmission_target_for_token(MSACAnalyticsTransmissionTarget *transmissionParent, char* transmissionTargetToken) {
+  return [transmissionParent transmissionTargetForToken: [NSString stringWithUTF8String:transmissionTargetToken]];
+}
+
+MSACPropertyConfigurator *appcenter_unity_transmission_get_property_configurator(MSACAnalyticsTransmissionTarget *transmission) {
+  return [transmission propertyConfigurator];
+}
+
+void appcenter_unity_transmission_pause(MSACAnalyticsTransmissionTarget *transmission)
+{
+  [transmission pause];
+}
+
+void appcenter_unity_transmission_resume(MSACAnalyticsTransmissionTarget *transmission)
+{
+  [transmission resume];
+}