Fixed migration from AssertUtils class to Utils

Author: smarek

library/src/main/java/com/loopj/android/http/FileAsyncHttpResponseHandler.java

@@ -52,8 +52,8 @@ public FileAsyncHttpResponseHandler(File file) {
      */
     public FileAsyncHttpResponseHandler(File file, boolean append) {
         super();
-        AssertUtils.asserts(file != null, "File passed into FileAsyncHttpResponseHandler constructor must not be null");
-        AssertUtils.asserts(file.getParentFile().mkdirs(), "Cannot create parent directories for requested File location");
+        Utils.asserts(file != null, "File passed into FileAsyncHttpResponseHandler constructor must not be null");
+        Utils.asserts(file.getParentFile().mkdirs(), "Cannot create parent directories for requested File location");
         this.mFile = file;
         this.append = append;
     }
@@ -85,7 +85,7 @@ public boolean deleteTargetFile() {
      * @return temporary file or null if creating file failed
      */
     protected File getTemporaryFile(Context context) {
-        AssertUtils.asserts(context != null, "Tried creating temporary file without having Context");
+        Utils.asserts(context != null, "Tried creating temporary file without having Context");
         try {
             // not effective in release mode
             assert context != null;