Correctly handle local display only for SRM version.

[ Merge of http://go/wvgerrit/105343 ]

If a device only supports local display (eliminating the need for an
SRM version), then the CDM should treat this as no SRM version.

Bug: 166009716
Test: License request integration test
Change-Id: I2d9c3f98735563df6d7c7a287abab41bf0a8c513

libwvdrmengine/cdm/core/test/test_printers.cpp

@@ -596,6 +596,9 @@ void PrintTo(const enum CdmResponseType& value, ::std::ostream* os) {
     case NO_MATCHING_ENTITLEMENT_KEY:
       *os << "NO_MATCHING_ENTITLEMENT_KEY";
       break;
+    case NO_SRM_VERSION:
+      *os << "NO_SRM_VERSION";
+      break;
     case NONCE_GENERATION_ERROR:
       *os << "NONCE_GENERATION_ERROR";
       break;