FrameInfo header fixes

Bug: 21560187

Log column names as part of output in case of other such
issues

Change-Id: I16157ed968307e761d416ca54bd7af5453fe67bf
diff --git a/libs/hwui/FrameInfo.h b/libs/hwui/FrameInfo.h
index c8189b8..816ef56 100644
--- a/libs/hwui/FrameInfo.h
+++ b/libs/hwui/FrameInfo.h
@@ -22,6 +22,7 @@
 #include <utils/Timers.h>
 
 #include <memory.h>
+#include <string>
 
 namespace android {
 namespace uirenderer {
@@ -49,6 +50,8 @@
     kNumIndexes
 };
 
+extern std::string FrameInfoNames[];
+
 enum class FrameInfoFlags {
     kWindowLayoutChanged = 1 << 0,
     kRTAnimation = 1 << 1,