DO NOT MERGE - 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
Change-Id: I25a4e688bc59efcff1e8298fd4676f9fa17d9b89
1 file changed