[Tether04] Migrate EntitlementManager into module

Bug: 136040414
Test: -build, flash, boot
      -atest TetheringTests
      -atest FrameworksNetTests

Change-Id: Ifdfc6cd95377351c37946a146b60896f07ece59d
Merged-In: Ifdfc6cd95377351c37946a146b60896f07ece59d
6 files changed