Enum types now emit operator| and operator|= for easier bitset manipulation.

Bug: 31702236
Change-Id: I166da2fe0019493c81151914ebabf591b705a713
Test: visual check, mma
diff --git a/Scope.h b/Scope.h
index 08683dd..fd6074c 100644
--- a/Scope.h
+++ b/Scope.h
@@ -52,6 +52,7 @@
     std::string pickUniqueAnonymousName() const;
 
     status_t emitTypeDeclarations(Formatter &out) const override;
+    status_t emitGlobalTypeDeclarations(Formatter &out) const override;
 
     status_t emitJavaTypeDeclarations(
             Formatter &out, bool atTopLevel) const override;