fix: Fix select HLG tracks when using AUTO hdr level (#7470)

Fixes #7468

Author: avelad

lib/media/adaptation_set_criteria.js

@@ -356,7 +356,14 @@ shaka.media.PreferenceBasedCriteria = class {
     if (hdrLevel == 'AUTO') {
       // Auto detect the ideal HDR level.
       if (window.matchMedia('(color-gamut: p3)').matches) {
-        hdrLevel = 'PQ';
+        const someHLG = variants.some((variant) => {
+          if (variant.video && variant.video.hdr &&
+              variant.video.hdr == 'HLG') {
+            return true;
+          }
+          return false;
+        });
+        hdrLevel = someHLG ? 'HLG' : 'PQ';
       } else {
         hdrLevel = 'SDR';
       }