Add LightsManager implementation to LightsService

Includes backend code to support LightsManager binder calls and route
them to the HALs.

Bug: 144979010
Bug: 144978691
Bug: 142715294
Fix: 142230898
Test: atest LightsManagerTest
Test: atest LightsServiceTest
Change-Id: I2db7f2caa432cd1e2389ea5ca6544200ada18675
Exempt-From-Owner-Approval: Reviewed in OOO OWNERS's stead.