Revert "Revert "Release PREVENT_BYPASS_KEYGUARD flag""

This reverts commit de1812dc.

I tested the test with this reverted as well as locally and the test class passes...I'm think it's possible that a teardown from a different test has caused these ones to fail

Change-Id: Idd8a2640f3515b6b5b851bc176f25d19c751408b
Test: tested on https://android-build.googleplex.com/builds/abtd/run/L00100000959784982 and it passes on abtd
Bug: 273341787