Remove the NetworkScore class.

This class is useless at this point and introduces overhead.

Bug: 113554781
Test: FrameworksNetTests
Change-Id: Ib5f540070222865260c16c7182cc13c710a243c2
Merged-In: Ib5f540070222865260c16c7182cc13c710a243c2
(cherry picked from commit c3489ad3a6ce98218ce223cea877586781025b98)
7 files changed