Ensure device is started before running JDWP tests

We need a started device to initialize the JDWP test infrastructure on device.
We now reboot the device after syncing the files and wait for boot complete.

Bug: 16959184

(cherry picked from commit 55975835)

Change-Id: Ib7e9909a7101298d9c3adf07bc563f6e14e7de38