Add VisitDirectDepsWithTag

Add a method on ModuleContext and TopDownMutatorContext to visit
direct dependencies that have a given dependency tag.

Test: m checkbuild
Change-Id: Ib875563091dcae6b7282b3e3427d0eb07d8c8af5
diff --git a/android/mutator.go b/android/mutator.go
index 8de57e1..2f13f6c 100644
--- a/android/mutator.go
+++ b/android/mutator.go
@@ -127,6 +127,7 @@
 	GetDirectDep(name string) (blueprint.Module, blueprint.DependencyTag)
 
 	VisitDirectDeps(visit func(Module))
+	VisitDirectDepsWithTag(tag blueprint.DependencyTag, visit func(Module))
 	VisitDirectDepsIf(pred func(Module) bool, visit func(Module))
 	VisitDepsDepthFirst(visit func(Module))
 	VisitDepsDepthFirstIf(pred func(Module) bool, visit func(Module))
@@ -230,6 +231,16 @@
 	})
 }
 
+func (a *androidTopDownMutatorContext) VisitDirectDepsWithTag(tag blueprint.DependencyTag, visit func(Module)) {
+	a.TopDownMutatorContext.VisitDirectDeps(func(module blueprint.Module) {
+		if aModule, _ := module.(Module); aModule != nil {
+			if a.TopDownMutatorContext.OtherModuleDependencyTag(aModule) == tag {
+				visit(aModule)
+			}
+		}
+	})
+}
+
 func (a *androidTopDownMutatorContext) VisitDirectDepsIf(pred func(Module) bool, visit func(Module)) {
 	a.TopDownMutatorContext.VisitDirectDepsIf(
 		// pred