Remove spurious "No Widevine PSSH" error log message

This log message was printed if initialization data was
not provided, which is actually not an error condition.

bug:116045153
Change-Id: I5597286ddf33d5b6c17f69f9a6a7cdba469b46b6

libwvdrmengine/cdm/core/src/initialization_data.cpp

@@ -66,7 +66,7 @@ InitializationData::InitializationData(const std::string& type,
     is_hls_ = true;
   }
 
-  if (is_supported()) {
+  if (data.size() && is_supported()) {
     if (is_cenc()) {
       bool oec_prefers_entitlements = DetectEntitlementPreference(oec_version);
       if (!SelectWidevinePssh(data, oec_prefers_entitlements, &data_)) {