Merge "Add support for cc_library_headers to replace llndk_headers"

cc/library.go

@@ -868,6 +868,7 @@ type versionedInterface interface {
 
 	implementationModuleName(name string) string
 	hasLLNDKStubs() bool
+	hasLLNDKHeaders() bool
 }
 
 var _ libraryInterface = (*libraryDecorator)(nil)
@@ -1682,6 +1683,12 @@ func (library *libraryDecorator) hasVestigialLLNDKLibrary() bool {
 	return String(library.Properties.Llndk_stubs) != ""
 }
 
+// hasLLNDKHeaders returns true if this cc_library module has a variant that provides headers
+// to a module that sets llndk.symbol_file.
+func (library *libraryDecorator) hasLLNDKHeaders() bool {
+	return Bool(library.Properties.Llndk.Llndk_headers)
+}
+
 func (library *libraryDecorator) implementationModuleName(name string) string {
 	return name
 }