What are the prerequisites for android platform development ? Is it linux kernel , linux administration or just familiarity of linux system ?
Based on your last comment being about how you want to contribute to AOSP, I would take a look at the Contributing to AOSP page.
All your contributions go through gerrit so reading up about that would also be useful.
Bugs and issues for AOSP can range in a variety of languages and forms, and they can use anyone with proficiency with c, java, and make files to name a few. Any knowledge on those subjects can be helpful.
You should also look into the Style Guidelines for contributing to AOSP or most of your patches will be rejected, they are very strict.