This change allows a device to include the lazy service implementation,
which will allow the HAL to exit when it is not in use.
Test: Manually observe brightness slider behavior
Change-Id: I7f8f747ebe6e183e1aaf1406852e6e26a97aee35
The getService() and registerAsService() methods of interface objects
now have default parameters of "default" for the service name. HALs
will not have to use any service name unless they want to register
more than one service.
Test: builds
Bug: 33844934
Change-Id: I042320d62f88ba9585ee05f33fe7592b5ffa1884
