this is the first step in unifying surfacetexture and surface.
for this reason the header files were not moved, as most of them
will eventually go away.
NOTE: currently we keep libsurfaceflinger_client.so as an empty
library to workaround prebuilt binaries wrongly linking against
it.
Change-Id: I130f0de2428e8579033dc41394d093f4e1431a00
Since libacc isn't 64-bit clean (it casts pointers to integers),
and so can't be built for the gHardy simulator, everything
that depends on it can't be built for the simulator either, which
means removing libRS and librs_jni.
