Add overload for finishFromCode with redirectUri.

Author: jiuyangzhao

src/main/java/com/dropbox/core/DbxWebAuth.java

@@ -295,6 +295,20 @@ public DbxAuthFinish finishFromCode(String code) throws DbxException {
         return finish(code);
     }
 
+    /**
+     * Call this after the user has visited the authorizaton URL with a redirectUrl and copy/pasted
+     * the authorization code that Dropbox gave them.
+     *
+     * @param code The authorization code shown to the user when they clicked "Allow" on the
+     *    authorization, page on the Dropbox website, never {@code null}.
+     * @param redirectUri The original redirect URI used by {@link #authorize}, never {@code null}.
+     *
+     * @throws DbxException if an error occurs communicating with Dropbox.
+     */
+    public DbxAuthFinish finishFromCode(String code, String redirectUri) throws DbxException {
+        return finish(code, redirectUri, null);
+    }
+
     /**
      * Call this after the user has visited the authorizaton URL and Dropbox has redirected them
      * back to you at the redirect URI.