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/reflection.cc b/runtime/reflection.cc
index 8446b52..4d24501 100644
--- a/runtime/reflection.cc
+++ b/runtime/reflection.cc
@@ -34,6 +34,8 @@
 
 namespace art {
 
+using android::base::StringPrintf;
+
 class ArgArray {
  public:
   ArgArray(const char* shorty, uint32_t shorty_len)