ART: Move to libbase StringPrintf

Remove ART's StringPrintf implementation. Fix up clients. Add
missing includes where necessary.

Test: m test-art-host
Change-Id: I564038d5868595ac3bb88d641af1000cea940e5a
diff --git a/runtime/plugin.cc b/runtime/plugin.cc
index 481b1ca..731967c 100644
--- a/runtime/plugin.cc
+++ b/runtime/plugin.cc
@@ -17,11 +17,15 @@
 #include "plugin.h"
 
 #include <dlfcn.h>
-#include "base/stringprintf.h"
+
+#include "android-base/stringprintf.h"
+
 #include "base/logging.h"
 
 namespace art {
 
+using android::base::StringPrintf;
+
 const char* PLUGIN_INITIALIZATION_FUNCTION_NAME = "ArtPlugin_Initialize";
 const char* PLUGIN_DEINITIALIZATION_FUNCTION_NAME = "ArtPlugin_Deinitialize";