Add a -q option (for "quick") to CTS.

This makes the cts command skip device info gathering, reloading
of previous test results, and the delays after installing and
uninstalling apks, greatly reducing the time to run cts if you
just need to run some local tests to make sure you didn't break
anything.

Change-Id: Ifee9cc7cd92275d5499f50739e9b47dcc8abf672
4 files changed