message: Treat mergeInFieldsFromFragmentSpreads as false in legacy codegen when flag isn't specified
  Compare
  See apollographql/apollo-android#1042.
diff: @@ -188,7 +188,7 @@ class LegacyIRTransformer {
  transformSelectionSetToLegacyIR(selectionSet: SelectionSet) {
  const typeCase = typeCaseForSelectionSet(
  selectionSet,
  - this.options.mergeInFieldsFromFragmentSpreads
  + !!this.options.mergeInFieldsFromFragmentSpreads
  );
  const fields: LegacyField[] = this.transformFieldsToLegacyIR(
  