L2CA_RegisterLECoc fix

We should register security record when we are server, so the condition
should be the same as "vpsm == psm", as in line 412 below.  So we should
use "pL2CA_ConnectInd_Cb != nullptr" (server has to have an incoming
connection handler), OR "psm < LE_DYNAMIC_PSM_START" (Fixed PSM service,
as it's treated like this for vpsm).

Tag: #stability
Bug: 193142224
Test: CtsVerifier LE COC client and server
Change-Id: I627e4dcd0aca4c113966952b53fad2be0f9d7104