Properly "bleed" 3p rules onto 3p-script/3p-frame cells

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2171

src/js/dynamic-net-filtering.js

@@ -320,6 +320,11 @@ class DynamicHostRuleFiltering {
             if ( this.evaluateCellZ(srcHostname, '*', type) !== 0 ) {
                 return this.r;
             }
+            if ( type.startsWith('3p-') ) {
+                if ( this.evaluateCellZ(srcHostname, '*', '3p') !== 0 ) {
+                    return this.r;
+                }
+            }
         }
 
         // Any destination, any party, any type