Convert version mutator to TransitionMutator

Replace cc.versionMutator with a TransitionMutator.

Bug: 319288033
Flag: EXEMPT refactor
Test: all soong tests pass
Change-Id: Idfd4157115d6f03997a339b43b3da9c2dfe2418d
diff --git a/cc/library_stub.go b/cc/library_stub.go
index 6f06333..6367825 100644
--- a/cc/library_stub.go
+++ b/cc/library_stub.go
@@ -303,7 +303,7 @@
 	return d.hasApexStubs()
 }
 
-func (d *apiLibraryDecorator) stubsVersions(ctx android.BaseMutatorContext) []string {
+func (d *apiLibraryDecorator) stubsVersions(ctx android.BaseModuleContext) []string {
 	m, ok := ctx.Module().(*Module)
 
 	if !ok {