ART: Clean up utils.h

Remove functionality provided by libbase. Move some single-use
functions to their respective users.

Test: m test-art-host
Change-Id: I75594035fa975200d638cc29bb9f31bc6e6cb29f
diff --git a/profman/profman.cc b/profman/profman.cc
index bfef834..0b2d172 100644
--- a/profman/profman.cc
+++ b/profman/profman.cc
@@ -25,6 +25,8 @@
 #include <string>
 #include <vector>
 
+#include "android-base/strings.h"
+
 #include "base/dumpable.h"
 #include "base/scoped_flock.h"
 #include "base/stringpiece.h"
@@ -48,7 +50,7 @@
   for (int i = 0; i < original_argc; ++i) {
     command.push_back(original_argv[i]);
   }
-  return Join(command, ' ');
+  return android::base::Join(command, ' ');
 }
 
 static constexpr int kInvalidFd = -1;