Hello,
I have experience in Android, since the API level 16 to the 28, NDK + SDK, in developed apps with UI, WebService, Geolocation, Google Services, as well as modules of the kernel Linux for Android.
Also, I worked with the use of UI testing tools, unit testing for Android platforms (Robotium, Espresso), and version-control system (git, svn, mercurial)
I'm really interested in start this project, my availabity is right now. I hope the acceptance of this proposal to start to work for you.
King regards.