Replace chrome string util with android base ones

Replaces <base/stringutils.h> with <android-base/stringutils.h>
Replaces base::StringPrintf with android::base::StringPrintf

This change is very mechanical, no change in program behavior only
library functions are being replaced.

Test: th
Change-Id: Ie5797a27ea3cdd3ff537216dc39dffeac052565e
diff --git a/certificate_checker.cc b/certificate_checker.cc
index 938c66f..d1dae83 100644
--- a/certificate_checker.cc
+++ b/certificate_checker.cc
@@ -21,7 +21,7 @@
 #include <base/logging.h>
 #include <base/strings/string_number_conversions.h>
 #include <base/strings/string_util.h>
-#include <base/strings/stringprintf.h>
+#include <android-base/stringprintf.h>
 #include <curl/curl.h>
 #include <openssl/evp.h>
 #include <openssl/ssl.h>
@@ -160,10 +160,11 @@
   // prefs.
   string digest_string = base::HexEncode(digest, digest_length);
 
-  string storage_key = base::StringPrintf("%s-%d-%d",
-                                          kPrefsUpdateServerCertificate,
-                                          static_cast<int>(server_to_check),
-                                          depth);
+  string storage_key =
+      android::base::StringPrintf("%s-%d-%d",
+                                  kPrefsUpdateServerCertificate,
+                                  static_cast<int>(server_to_check),
+                                  depth);
   string stored_digest;
   // If there's no stored certificate, we just store the current one and return.
   if (!prefs_->GetString(storage_key, &stored_digest)) {