Request PS preferred scan after ePDN setup failure in limited state

ePDN setup can fail if it is requested while initial registration is
on going and the registration is rejected.
To recover this exceptional case, request PS preferred scan instead of
CS preferred scan to retry on the same network with emergency attach.

Bug: 331167263
Test: atest EmergencyCallDomainSelectorTest
Change-Id: I3b2aaf9511188c954fc38197af281d7c105df0f4
2 files changed