Adds VS App Center analytics + crash reporting

Currently tracks install, refresh, and update app events.

Pods/AppCenter/AppCenter-SDK-Apple/iOS/AppCenterAnalytics.framework/Headers/MSService.h

@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#ifndef MS_SERVICE_H
+#define MS_SERVICE_H
+
+#import <Foundation/Foundation.h>
+
+/**
+ * Protocol declaring service logic.
+ */
+@protocol MSService <NSObject>
+
+/**
+ * Enable or disable this service.
+ * The state is persisted in the device's storage across application launches.
+ *
+ * @param isEnabled Whether this service is enabled or not.
+ *
+ * @see isEnabled
+ */
++ (void)setEnabled:(BOOL)isEnabled;
+
+/**
+ * Indicates whether this service is enabled.
+ *
+ * @return `YES` if this service is enabled, `NO` if it is not.
+ *
+ * @see setEnabled:
+ */
++ (BOOL)isEnabled;
+
+@end
+
+#endif