Compatibility work around for bad graphics driver dependency.

This is a compatibility shim for one product whose drivers
are depending on SurfaceComposerClient::getDisplayInfo(
int, DisplayInfo*) when it really shouldn't.

Revert this patch when the problem has been resolved.

Bug: 7065398
Change-Id: I6542691b81fd1b1e1d79500a62e82d40a3d51db7

Conflicts:
 include/gui/SurfaceComposerClient.h
 libs/gui/SurfaceComposerClient.cpp