Remove blueprint.Module helper functions

Now that blueprint_go_binary modules are wrapped in a module type
that implements android.Module Soong should never see a blueprint.Module.
Remove the versions of the context methods that allow working with
blueprint.Modules.

Genrules still need VisitDirectDepsAllowDisabled, as they use a hack
that adds dependencies on host tools after the prebuilts mutators have
run, which means they may have a dependency on a disabled prebuilt
and need to manually forward it to the corresponding source module.

Test: all soong tests pass
Flag: EXEMPT refactor
Change-Id: I9147b450269749326e8fe75c5af310bd2d898d8c
diff --git a/apex/apex.go b/apex/apex.go
index 79f1ad6..5f4d823 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -1935,12 +1935,12 @@
 	})
 }
 
-func (a *apexBundle) depVisitor(vctx *visitorContext, ctx android.ModuleContext, child, parent blueprint.Module) bool {
+func (a *apexBundle) depVisitor(vctx *visitorContext, ctx android.ModuleContext, child, parent android.Module) bool {
 	depTag := ctx.OtherModuleDependencyTag(child)
 	if _, ok := depTag.(android.ExcludeFromApexContentsTag); ok {
 		return false
 	}
-	if mod, ok := child.(android.Module); ok && !mod.Enabled(ctx) {
+	if !child.Enabled(ctx) {
 		return false
 	}
 	depName := ctx.OtherModuleName(child)
@@ -2284,7 +2284,7 @@
 		checkDuplicate:         a.shouldCheckDuplicate(ctx),
 		unwantedTransitiveDeps: a.properties.Unwanted_transitive_deps,
 	}
-	ctx.WalkDepsBlueprint(func(child, parent blueprint.Module) bool { return a.depVisitor(&vctx, ctx, child, parent) })
+	ctx.WalkDeps(func(child, parent android.Module) bool { return a.depVisitor(&vctx, ctx, child, parent) })
 	vctx.normalizeFileInfo(ctx)
 	if a.privateKeyFile == nil {
 		if ctx.Config().AllowMissingDependencies() {
@@ -2685,7 +2685,7 @@
 func (a *apexBundle) checkJavaStableSdkVersion(ctx android.ModuleContext) {
 	// Visit direct deps only. As long as we guarantee top-level deps are using stable SDKs,
 	// java's checkLinkType guarantees correct usage for transitive deps
-	ctx.VisitDirectDepsBlueprint(func(module blueprint.Module) {
+	ctx.VisitDirectDeps(func(module android.Module) {
 		tag := ctx.OtherModuleDependencyTag(module)
 		switch tag {
 		case javaLibTag, androidAppTag:
@@ -2778,7 +2778,7 @@
 
 // checkStaticExecutable ensures that executables in an APEX are not static.
 func (a *apexBundle) checkStaticExecutables(ctx android.ModuleContext) {
-	ctx.VisitDirectDepsBlueprint(func(module blueprint.Module) {
+	ctx.VisitDirectDeps(func(module android.Module) {
 		if ctx.OtherModuleDependencyTag(module) != executableTag {
 			return
 		}