* In a recent change, we mistakenly removed the logic for handling
too-long inactivity timeouts; we should just fall back to the maximum
since this is stricter than what we're being asked to enforce
* Restore this logic and update the unit test
* The regression was caused by change Ida5663a9, to wit:
Backport: Handle "Allow non-provisionable devices" properly
Bug: 2886746
Change-Id: I99cf9a37441b80477cc1c2c7ec2a78f8a14a83da
81fbc1e1b9