Hello, I have 6 years of experience working for a big videogame company, China was one of our bigger markets and my job was to implement billing system for such markets, such as ATET, VXinyou and many more, that makes me the right candidate for this project. I stopped working for such company on October 2014, and by the time Google was not available in the Chinese market, so to answer your 3 questions in a single paragraph:
There are ways to avoid cashing your application, but as you are deploying it in the Baidu market it is better to remove any reference to Google Plat Services. If Baidu is strict, they will ask you to remove it when submitting your app.