Show saved networks before scored networks.

Changing ranking order to prioritize saved networks over scored
networks.

Bug: 34716123
Test: Turn on scoring and scoring UI features, ensure unscored saved
network appears before unsaved scored network. Working on adding tests
for AccessPoint.java separately.

Change-Id: Ib53ade6c0e3756e2595ba6a73bf1a0fdc05e3074