Adding a timeout for active-unlock

Adding a timer for active-unlock. This timer should interact smoothly
with the timer for extend unlock. That means that if there is a timer
for extend unlock that expires while the active unlock timer is running,
it should set the phone back into a trustable state. If there is an
extend unlock timer when the active-unlock timer expires it should
prevent active-unlocking but allow extend unlock to continue.

Test: manual
Fixes: 215391978

Change-Id: Ia0ccf7ecc9dacf9f4a7a913c7fce8532e6a1ece1
Merged-In: Ia0ccf7ecc9dacf9f4a7a913c7fce8532e6a1ece1
(cherry picked from commit 2410cfc0)