[mobile] Provide a method to save a file

mobile/src/com/cradle/iitc_mobile/IITC_JSInterfaceKitkat.java

@@ -0,0 +1,17 @@
+package com.cradle.iitc_mobile;
+
+import android.annotation.TargetApi;
+import android.webkit.JavascriptInterface;
+
+@TargetApi(19)
+public class IITC_JSInterfaceKitkat extends IITC_JSInterface {
+    public IITC_JSInterfaceKitkat(final IITC_Mobile iitc) {
+        super(iitc);
+    }
+
+    @JavascriptInterface
+    public void saveFile(final String filename, final String type, final String content) {
+
+        mIitc.getFileManager().new FileSaveRequest(filename, type, content);
+    }
+}