adbc1ac905
5G has two operating modes: stand-alone and non-standalone. The vast majority of support is currently for non-standalone mode. Because Android currently cannot tell the difference between the supported modes in the modem, and because a device that supports non-standalone mode shoudn't scan for 5G during a PLMN selection procedure (it can't camp on 5G, hence non- standalone mode), disable 5G scans by default and revisit once modem support exists to distinguish between the two modes. This avoids alternatives such as allowing 5G to be silently removed in the RIL or for a 5G scan to be performed which doesn't provide the user any meaningful options. A separate bug has been filed (b/151119451) to revisit this logic once the modem supports interrogation of its 5G capability. Bug: 149528140 Test: compilation Change-Id: I4e19b43e6529b5c673bb54c6f8f94c44a7c5bee5