Added ClearOneSignalNotifications for Android

Author: jkasten2

Unity4.7OneSignalExample/Assets/Plugins/Android/OneSignal/libs/OneSignalSDK.jar

@@ -220,6 +220,12 @@ public static void EnableNotificationsWhenActive(bool enable) {
          ((OneSignalAndroid)oneSignalPlatform).EnableNotificationsWhenActive(enable);
       #endif
    }
+   
+   public static void ClearOneSignalNotifications() {
+      #if ANDROID_ONLY
+         ((OneSignalAndroid)oneSignalPlatform).ClearOneSignalNotifications();
+      #endif
+   }
 
    public static void EnableInAppAlertNotification(bool enable) {
       #if ONESIGNAL_PLATFORM

Unity4.7OneSignalExample/Assets/Plugins/OneSignal/OneSignal.cs

@@ -108,5 +108,9 @@ public void SetEmail(string email) {
   public void PromptLocation() {
     mOneSignal.Call("promptLocation");
   }
+  
+  public void ClearOneSignalNotifications() {
+    mOneSignal.Call("clearOneSignalNotifications");
+  }
 }
 #endif

Unity4.7OneSignalExample/Assets/Plugins/OneSignal/OneSignalAndroid.cs

@@ -1 +1 @@
-1.15.1
+1.15.2

Unity4.7OneSignalExample/Assets/Plugins/OneSignal/VERSION

@@ -1 +1 @@
-1.15.1
+1.15.2

Unity4.7OneSignalSDK.unitypackage

@@ -220,6 +220,12 @@ public static void EnableNotificationsWhenActive(bool enable) {
          ((OneSignalAndroid)oneSignalPlatform).EnableNotificationsWhenActive(enable);
       #endif
    }
+   
+   public static void ClearOneSignalNotifications() {
+      #if ANDROID_ONLY
+         ((OneSignalAndroid)oneSignalPlatform).ClearOneSignalNotifications();
+      #endif
+   }
 
    public static void EnableInAppAlertNotification(bool enable) {
       #if ONESIGNAL_PLATFORM

Unity5OneSignalExample/Assets/OneSignal/Platforms/Android/onesignal-unity.aar

@@ -108,5 +108,9 @@ public void SetEmail(string email) {
   public void PromptLocation() {
     mOneSignal.Call("promptLocation");
   }
+  
+  public void ClearOneSignalNotifications() {
+    mOneSignal.Call("clearOneSignalNotifications");
+  }
 }
 #endif