Initial version of clipped saveLayer in new pipeline

Additionally disables usage of FBO cache, so FBO destruction safely
interacts with renderstate caching.

Change-Id: I25c277cb7afec2ca33bf226445d6c8867a15a915
diff --git a/libs/hwui/Layer.cpp b/libs/hwui/Layer.cpp
index f99d92b..489ebc1 100644
--- a/libs/hwui/Layer.cpp
+++ b/libs/hwui/Layer.cpp
@@ -155,8 +155,7 @@
 
     if (fbo) {
         if (flush) LayerRenderer::flushLayer(renderState, this);
-        // If put fails the cache will delete the FBO
-        caches.fboCache.put(fbo);
+        renderState.deleteFramebuffer(fbo);
         fbo = 0;
     }
 }