SystemServer is currently a monolithic class that brings up key system
services. This change is the first phase of refactoring it to be more
configurable. Specifically, it adds a set of on/off switches used to control
startup of individual services. Future plans include finer grained controls
and a more explicit and consistent startup sequence for these services.
Change-Id: I7299f5ce7d7b74a34eb56dffb788366fbc058532
This helps reduce the pressure on framework.jar, and makes it clear
that it should only be used by the system_server.
Bug: 7333397
Change-Id: I0858904239535380fbf30562b793e277d8c3f054