SF: Add LayerName to CompositionInfo

Add layerName to CompositionInfo for tracking/debug purposes

Test: Compile
Merged-Id: I445a32f2a095dae435581888171a46082880c1e4
Change-Id: I445a32f2a095dae435581888171a46082880c1e4
diff --git a/services/surfaceflinger/LayerBE.cpp b/services/surfaceflinger/LayerBE.cpp
index 22e38aa..5287fe1 100644
--- a/services/surfaceflinger/LayerBE.cpp
+++ b/services/surfaceflinger/LayerBE.cpp
@@ -23,10 +23,11 @@
 
 namespace android {
 
-LayerBE::LayerBE(Layer* layer)
+LayerBE::LayerBE(Layer* layer, std::string layerName)
       : mLayer(layer),
         mMesh(Mesh::TRIANGLE_FAN, 4, 2, 2) {
     compositionInfo.layer = this;
+    compositionInfo.layerName = layerName;
 }
 
 void LayerBE::onLayerDisplayed(const sp<Fence>& releaseFence) {