SurfaceFlinger: add composer 2.4 vsync api to DisplayHardware

Add the new functions to DisplayHardware wrappers. The following CLs
will do something useful with the new functionality.

Test: rev up composer to 2.4 and test refresh rate switching
Bug: 141329414
Change-Id: Iaf98d0abc56dd393845b16c87dd92b0bad582c0f
11 files changed