Add isActiveUnlockRunning

Add isActiveUnlockRunning and onIsActiveUnlockRunningChanged, in order to
track when active unlock is available on the device or not. Listeners
are notified if the value is true on subscription.

Test: atest, local build, verify listeners notified
Bug: b/267322286
Change-Id: Ibceac9d721190a4da3905e71d11c4424f7ee9676
Merged-In: Ibceac9d721190a4da3905e71d11c4424f7ee9676
12 files changed