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/compiler/utils/arm/assembler_thumb2_test.cc b/compiler/utils/arm/assembler_thumb2_test.cc
index 30e8f4e..0147a76 100644
--- a/compiler/utils/arm/assembler_thumb2_test.cc
+++ b/compiler/utils/arm/assembler_thumb2_test.cc
@@ -16,12 +16,15 @@
 
 #include "assembler_thumb2.h"
 
+#include "android-base/stringprintf.h"
+
 #include "base/stl_util.h"
-#include "base/stringprintf.h"
 #include "utils/assembler_test.h"
 
 namespace art {
 
+using android::base::StringPrintf;
+
 class AssemblerThumb2Test : public AssemblerTest<arm::Thumb2Assembler,
                                                  arm::Register, arm::SRegister,
                                                  uint32_t> {