Squashed merge 3 CLs.

1. "Change CdmResponseType from enum into a struct"
Merged from http://go/wvgerrit/163199
Bug: 253271674

2. "Log request information when server returns 401"
Bug: 260760387
Bug: 186031735
Merged from http://go/wvgerrit/162798

3. "Specify server version on the command line"
Bug: 251599048
Merged from http://go/wvgerrit/158897

Test: build android.hardware.drm-service.widevine
Test: Netflix and Play Movies & TV
Test: build_and_run_all_unit_tests.sh

Bug: 253271674
Change-Id: I70c950acce070609ee0343920ec68e66b058bc23

libwvdrmengine/src/wv_metrics.cpp

@@ -162,8 +162,8 @@ string FormatAttributes(const string& indent, const Attributes& attributes) {
     result.append("error_code:\n");
     string next_indent = indent + kIndentSpaces;
     result.append(next_indent + "name: ");
-    result.append(CdmResponseTypeToString(static_cast<wvcdm::CdmResponseType>(
-        attributes.error_code())));
+    result.append(wvcdm::CdmResponseEnumToString(
+            wvcdm::CdmResponseEnum(attributes.error_code())));
     result.append("\n" + next_indent + "value: ");
     result.append(to_string(attributes.error_code()));
   }