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/libcurl_http_fetcher.cc b/libcurl_http_fetcher.cc
index 2e5a520..0ffb60b 100644
--- a/libcurl_http_fetcher.cc
+++ b/libcurl_http_fetcher.cc
@@ -30,7 +30,7 @@
 #include <base/logging.h>
 #include <base/strings/string_split.h>
 #include <base/strings/string_util.h>
-#include <base/strings/stringprintf.h>
+#include <android-base/stringprintf.h>
 #include <base/threading/thread_task_runner_handle.h>
 
 #ifdef __ANDROID__
@@ -196,7 +196,7 @@
   if (post_data_set_) {
     // Set the Content-Type HTTP header, if one was specifically set.
     if (post_content_type_ != kHttpContentTypeUnspecified) {
-      const string content_type_attr = base::StringPrintf(
+      const string content_type_attr = android::base::StringPrintf(
           "Content-Type: %s", GetHttpContentTypeString(post_content_type_));
       curl_http_headers_ =
           curl_slist_append(curl_http_headers_, content_type_attr.c_str());
@@ -222,7 +222,7 @@
     }
 
     // Create a string representation of the desired range.
-    string range_str = base::StringPrintf(
+    string range_str = android::base::StringPrintf(
         "%" PRIu64 "-", static_cast<uint64_t>(resume_offset_));
     if (end_offset)
       range_str += std::to_string(end_offset);