Trace some interesting events

Bug: 18337099
Change-Id: Ie2e60da2b9f06e0368061c944d8123ab6903355c
diff --git a/libs/hwui/renderthread/EglManager.cpp b/libs/hwui/renderthread/EglManager.cpp
index 9bd6f41..378cf61 100644
--- a/libs/hwui/renderthread/EglManager.cpp
+++ b/libs/hwui/renderthread/EglManager.cpp
@@ -82,6 +82,8 @@
 void EglManager::initialize() {
     if (hasEglContext()) return;
 
+    ATRACE_NAME("Creating EGLContext");
+
     mEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
     LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY,
             "Failed to get EGL_DEFAULT_DISPLAY! err=%s", egl_error_str());