Add missing trace points

Test: traced opening recents
Change-Id: I51675f1c49f27f1bfa5b18e3d3dd7162e58b1cb8
diff --git a/libs/hwui/Readback.cpp b/libs/hwui/Readback.cpp
index fb60a96..89a9b99 100644
--- a/libs/hwui/Readback.cpp
+++ b/libs/hwui/Readback.cpp
@@ -84,6 +84,7 @@
 }
 
 CopyResult Readback::copyLayerInto(DeferredLayerUpdater* deferredLayer, SkBitmap* bitmap) {
+    ATRACE_CALL();
     if (!mRenderThread.getGrContext()) {
         return CopyResult::UnknownError;
     }
@@ -104,6 +105,7 @@
 
 CopyResult Readback::copyImageInto(const sk_sp<SkImage>& image, Matrix4& texTransform,
                                    const Rect& srcRect, SkBitmap* bitmap) {
+    ATRACE_CALL();
     if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaGL) {
         mRenderThread.requireGlContext();
     } else {