Update channel CPU shim include and retain frozen projected driver

tests/unit/cpp/channel_root.cpp

@@ -42,6 +42,7 @@ inline float __fdiv_rn(float a,float b){return a/b;}
 #include "step/one_step_double.cu"
 #else
 #include "core/cell_kind.cuh"
+#include "operators/block_collision.cuh"
 #include "step/block_channel.cu"
 #endif
 int main(){