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/WVDrmFactory.cpp

@@ -205,8 +205,9 @@ void WVDrmFactory::printCdmMetrics(int fd) {
       dprintf(fd, "%s\n", formatted.c_str());
     }
   } else {
-    dprintf(fd, "  error_message: %s\n", ::wvcdm::CdmResponseTypeToString(result));
-    dprintf(fd, "  error_code: %d\n", result);
+    dprintf(fd, "  error_message: %s\n",
+            wvcdm::CdmResponseEnumToString(result.Enum()));
+    dprintf(fd, "  error_code: %d\n", static_cast<int>(result));
   }
 }