So, I was finally able to build and debug the android platform (the process can be seen here). Now, the question is: where are the unit tests, how do I launch them and where do I see results?
And also, is there any guide to android platform architecture?
I guess there is no way to run every unit test on Android src.
I don't know about the C code, but you can see that inside some git repos holding Android apps like Contacts they have a tests folder which is an android test project. You can check how to run them here.