ANDROID: consolidate READMEs and supplement

Consolidate the two READMEs into one and extend it with more information
about the integration of kselftest into VTS.

Bug: 80090959
Change-Id: I86581f6ced325abc9def1b114b1525b62f3a3c35
Signed-off-by: Steve Muckle <smuckle@google.com>
3 files changed