Set country code even when device is not registered on network

Extends the functionality of getNetworkCountryIso to support
no SIM/no service case. When no SIM/no service, it returns
the country code of nearby network (unregistered but cell info
is available to the device).

Test: Manual
Bug: 64335394
Merged-In: If7fc06d5a7430262b2e3ab13a7377eb829595113
Change-Id: If7fc06d5a7430262b2e3ab13a7377eb829595113
(cherry picked from commit a7c7c98321ff22166c5aa311002cbcdbba5e4263)
1 file changed