Preferred network list add 5G item

Preferred network list add 5G item, and change "recommended" from 4G to
5G, and add summary for 5G.

Bug: 138544359
Test: 1.fake the device network type bitmask to 5G, UI show 5G list
2.atest EnabledNetworkModePreferenceControllerTest.java :pass

Change-Id: I4a78e2e7fbb067ce841df4aaf1d5161607fdcf90
Merged-In: I4a78e2e7fbb067ce841df4aaf1d5161607fdcf90