Add LocalManagerRegistry inside system server.

This is similar to LocalServices, but dedicated to module API in the
same process.

Bug: 158736025
Test: presubmit
Merged-In: Ib9f14070a665ebd8c582376d7ea044d9b945b6b0
Change-Id: Ib9f14070a665ebd8c582376d7ea044d9b945b6b0
3 files changed