Start implementing SurfaceTexture streaming into RS allocations.

Change-Id: I561fbb63c63371ea59047c07fb2d68c21d16e76b
diff --git a/libs/rs/rs_hal.h b/libs/rs/rs_hal.h
index a5df600..1e222e1 100644
--- a/libs/rs/rs_hal.h
+++ b/libs/rs/rs_hal.h
@@ -115,6 +115,7 @@
                        bool zeroNew);
         void (*syncAll)(const Context *rsc, const Allocation *alloc, RsAllocationUsageType src);
         void (*markDirty)(const Context *rsc, const Allocation *alloc);
+        int32_t (*initSurfaceTexture)(const Context *rsc, const Allocation *alloc);
 
         void (*data1D)(const Context *rsc, const Allocation *alloc,
                        uint32_t xoff, uint32_t lod, uint32_t count,