Use callback to update sensor properties

The callback is called in BiometricServiceRegistry where the props are
updated. Any update in the value will update the cached values in
Keyguard, keeping it up to date and avoiding stale values.

Bug: b/272528261
Test: Manual (tried enrollment and authentication for face and
fingerprint), atest KeyguardUpdateMonitorTest

Change-Id: I1f4e73db257057c2f82624da1163a146a4b65a65