Add new rule to display 5G+ icon.

The new rule is that if the device camps on an NR specific band
(it defines by carrier config), then TelephonyDisplayInfo's
OverrideNetworkType is OVERRIDE_NETWORK_TYPE_NR_ADVANCED.

Bug: 183652287
Test: build pass, atest NetworkTypeControllerTest (pass)
Change-Id: I5ece455abc02efcbf59e8f658215d7bcd3a4d745