Add ModuleWithMinSdkVersionCheck type.

This is to help following refactor for individual modules to have their
own version of checking where needed.

For example, apk in apex may want to enforce it's own version of
CheckMinSdkVersion.

Bug: 205923322
Test: presubmit
Change-Id: Ia2fad6c52af39e21f65385bcb283f1e3adab5548
diff --git a/android/apex.go b/android/apex.go
index 461faf7..d5fd922 100644
--- a/android/apex.go
+++ b/android/apex.go
@@ -908,16 +908,17 @@
 //
 // Return true if the `to` module should be visited, false otherwise.
 type PayloadDepsCallback func(ctx ModuleContext, from blueprint.Module, to ApexModule, externalDep bool) bool
+type WalkPayloadDepsFunc func(ctx ModuleContext, do PayloadDepsCallback)
 
-// UpdatableModule represents updatable APEX/APK
-type UpdatableModule interface {
+// ModuleWithMinSdkVersionCheck represents a module that implements min_sdk_version checks
+type ModuleWithMinSdkVersionCheck interface {
 	Module
-	WalkPayloadDeps(ctx ModuleContext, do PayloadDepsCallback)
+	CheckMinSdkVersion(ctx ModuleContext)
 }
 
 // CheckMinSdkVersion checks if every dependency of an updatable module sets min_sdk_version
 // accordingly
-func CheckMinSdkVersion(m UpdatableModule, ctx ModuleContext, minSdkVersion ApiLevel) {
+func CheckMinSdkVersion(ctx ModuleContext, minSdkVersion ApiLevel, walk WalkPayloadDepsFunc) {
 	// do not enforce min_sdk_version for host
 	if ctx.Host() {
 		return
@@ -933,7 +934,7 @@
 		return
 	}
 
-	m.WalkPayloadDeps(ctx, func(ctx ModuleContext, from blueprint.Module, to ApexModule, externalDep bool) bool {
+	walk(ctx, func(ctx ModuleContext, from blueprint.Module, to ApexModule, externalDep bool) bool {
 		if externalDep {
 			// external deps are outside the payload boundary, which is "stable"
 			// interface. We don't have to check min_sdk_version for external