Implement NRPA rotation

As per CORE v5.3, Vol 3, Part C 10.7.1 NRPA should only be set for specified timeout, after which it'll change:

> 10.7.1.2
The Host shall generate a (...) non- resolvable private address procedure as defined in Section 10.8.2.1. The Host shall set a timer equal to T GAP (private_addr_int). The Host shall generate a new (...) non-resolvable private address when the timer T GAP (private_addr_int) expires.

This is being checked in GAP/BROB/BCST/BV-04-C

Start with the GAP/BROB/BCST/BV-04-C qualification test and the CORE v5.3 Vol 3, Part C 10.7.1. Trace the NRPA handling entry point and determine where T GAP (private_addr_int) is applied; done means the NRPA changes when that timer expires and the qualification test passes.

Written by the indexing model from the issue text.