Change the definition of noDefaultNetwork and noValidatedNetwork

Currently SysUI only supports Cellular, WiFi or Ethernet as the default
netwok, so if none of them is the default network, SysUI will display
the no default network icon.

Bug: 187611967
Test: Manual testing
Change-Id: I60b210b17acfeaaa200e8196bba8ec2d43df9fbc
1 file changed