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: I66ede7833e61d9cf255238888099aa73986b1946
This is only for hals which are currently only in master. Separate
commit for hals currently in AOSP.
Test: pass
Change-Id: I0b1a09798c49f4f0141f36a322c4749e47eded03