Remove references to NetworkBadging.

Removes all references to the deprecated NetworkBadging class. Replaces
Badging enums with AccessPoint.Speed. Uses SettingsLib Utils class to
get the WifiIcons.

Note: This change depends on ag/2676505.

Bug: 62355275
Test: make -j40 RunSettingsRoboTests
Change-Id: If3301ce30e22a7b2cc4d534b0a89e6d7ddfef45b