NR connected idle state handles both NR/NR advanced

1. In order to support the NR idle timer properly, the device needs to
   transition to NR idle state when the PCC list is empty regardless of
   if it's NR advanced or not.
2. Since NR idle state icon can be either 5G/5G+, update primary timer
   reset logic to be based on the state instead of the icon.
3. If there is already a primary timer running, ignore subsequent
   primary timers until the first one expires.
4. Remove the timer check in idle state PCI change condition, since this
   was added for an obsolete idle <-> connected idle timer.
5. Fix minor bug initialization and timer reset for idle mode.

Test: atest NetworkTypeControllerTest
Bug: 314349757
Change-Id: Idcd0c77fae1b113c89b9e928ab4e13d1d6400058