The end of CONFIG_ANDROID

I think you have misinterpreted the suggestion in the second last post in the thread. They were not suggesting that expiry of the time period cause wakeups, but instead that when something else caused a wakeup, then before using the keys again, check if the minimum time has passed and do the key expiry and renegotiation then. Doing it that way would not cause laptops to wake up in backpacks. This does mean that keys stay around across suspend and maybe that is not desirable though?