Use Widely Supported GSM Channels for NetworkScan

Change the network scan tests to use the P900 and 850
GSM bands, which are commonly (nearly universally) supported
bands.

Bug: 132076611
Test: atest RadioHidlTest_v1_2
Change-Id: Icb4dc47360a5753b9697f74aec19045155ee27fc
1 file changed