Adds a VersionInfo message to SignedMessage

[ Merge from http://go/wvgerrit/72724 ]

This adds a message that contains SDK and service version information
useful for debugging problems that occur because of different services.

BUG: 80536436

Test: Unit tests and manual GPlay testing.
Change-Id: I095f893b907ea7c2cd149155fb2cd4c7181e7bb2

libwvdrmengine/cdm/core/src/license.cpp

@@ -514,6 +514,9 @@ CdmResponseType CdmLicense::HandleKeyResponse(
     LOGE("CdmLicense::HandleKeyResponse: not initialized");
     return LICENSE_PARSER_NOT_INITIALIZED_2;
   }
+  // Clear the latest service version when we receive a new response.
+  latest_service_version_.Clear();
+
   if (license_response.empty()) {
     LOGE("CdmLicense::HandleKeyResponse: empty license response");
     return EMPTY_LICENSE_RESPONSE_1;
@@ -527,6 +530,8 @@ CdmResponseType CdmLicense::HandleKeyResponse(
     return INVALID_LICENSE_RESPONSE;
   }
 
+  latest_service_version_ = signed_response.service_version_info();
+
   if (use_privacy_mode_ && Properties::allow_service_certificate_requests() &&
       signed_response.type() == SignedMessage::SERVICE_CERTIFICATE) {
     std::string signed_certificate;