Support buildLayer in new pipeline

bug:26561995
bug:27620686

Change-Id: I6c39f9a077e7e6002d3c01b8888238fd17b0f02a
diff --git a/libs/hwui/FrameBuilder.h b/libs/hwui/FrameBuilder.h
index 02c05cb..e418227 100644
--- a/libs/hwui/FrameBuilder.h
+++ b/libs/hwui/FrameBuilder.h
@@ -137,12 +137,14 @@
         }
 
         GL_CHECKPOINT(MODERATE);
-        const LayerBuilder& fbo0 = *(mLayerBuilders[0]);
-        renderer.startFrame(fbo0.width, fbo0.height, fbo0.repaintRect);
-        GL_CHECKPOINT(MODERATE);
-        fbo0.replayBakedOpsImpl((void*)&renderer, unmergedReceivers, mergedReceivers);
-        GL_CHECKPOINT(MODERATE);
-        renderer.endFrame(fbo0.repaintRect);
+        if (CC_LIKELY(mDrawFbo0)) {
+            const LayerBuilder& fbo0 = *(mLayerBuilders[0]);
+            renderer.startFrame(fbo0.width, fbo0.height, fbo0.repaintRect);
+            GL_CHECKPOINT(MODERATE);
+            fbo0.replayBakedOpsImpl((void*)&renderer, unmergedReceivers, mergedReceivers);
+            GL_CHECKPOINT(MODERATE);
+            renderer.endFrame(fbo0.repaintRect);
+        }
     }
 
     void dump() const {
@@ -239,6 +241,8 @@
 
     // contains single-frame objects, such as BakedOpStates, LayerBuilders, Batches
     LinearAllocator mAllocator;
+
+    const bool mDrawFbo0;
 };
 
 }; // namespace uirenderer