A LibertasTimer created with Libertas_TimerNew.
Timer is always a one-off. When the timeout is reached, the callback is called, and the timer is then automatically canceled as if Libertas_TimerCancel is called.
Both active timer and canceled timer can be reused by calling Libertas_TimerUpdate. Always try to reuse instead of creating new timers.
Timer API is reactive API. Timers are driven by Libertas_WaitReactive. Never mix imperative and reactive API within the same thread.
Cancels a timer and releases all related resources.