Move json util code to common

So that it can be shared by CE CDM extraction tool later.

Test: m wv_factory_extraction_tool
Bug: 414642286
Change-Id: I6dba70227ce2789dd3686ebbf6ed3a0dbf68dc00

libwvdrmengine/tools/factory_upload_tool/aosp/src/WidevineProvisioner.cpp

@@ -20,6 +20,7 @@
 #include <utility>
 
 #include "WidevineOemcryptoInterface.h"
+#include "json_utils.h"
 #include "log.h"
 #include "properties.h"
 #include "string_conversions.h"
@@ -32,51 +33,6 @@ const std::vector<std::vector<uint8_t>> kAuthorizedEekRoots = {
      0x62, 0xDC, 0x3E, 0x61, 0xAB, 0x57, 0x48, 0x7D, 0x75, 0x37, 0x29,
      0xAD, 0x76, 0x80, 0x32, 0xD2, 0xB3, 0xCB, 0x63, 0x58, 0xD9},
 };
-
-std::string EscapeJson(const std::string& input) {
-  std::string result;
-  for (std::string::const_iterator c = input.begin(); c != input.end(); ++c) {
-    switch (*c) {
-      case '\"':
-        result += "\\\"";
-        break;
-      case '\\':
-        result += "\\\\";
-        break;
-      case '\b':
-        result += "\\b";
-        break;
-      case '\f':
-        result += "\\f";
-        break;
-      case '\n':
-        result += "\\n";
-        break;
-      case '\r':
-        result += "\\r";
-        break;
-      case '\t':
-        result += "\\t";
-        break;
-      default:
-        result += *c;
-        break;
-    }
-  }
-  return result;
-}
-
-std::string StringMapToJson(
-    const std::map<std::string, std::string>& string_map) {
-  std::string json = "{";
-  for (const auto& value_pair : string_map) {
-    json.append("\"" + value_pair.first + "\": " + "\"" + value_pair.second +
-                "\",");
-  }
-  json.resize(json.size() - 1);  // Remove the last comma.
-  json.append("}");
-  return json;
-}
 }  // namespace
 
 WidevineProvisioner::WidevineProvisioner() {