Disable lock screen and enable location in THM

In Test Harness Mode, the lock screen will be disabled so that tests can
start immediately, and location will be enabled (for use with CTS).

Bug: 80137798
Test: make, adb shell cmd testharness enable
Change-Id: I08f4c06865013d2cbdf7e95cf12fdf469c30b9e7
(cherry picked from commit fd0230bf)