Allow WalkPayloadDeps to be called from mutators

Replace ModuleContext with BaseModuleContext in WalkPayloadDeps
and all of the callbacks used with it to allow using WalkPayloadDeps
from mutators.

Test: builds
Flag: EXEMPT refactor
Change-Id: Ie9d6cb7e9977b1d963cfbb3e43d6749307b4b1e0
diff --git a/android/apex.go b/android/apex.go
index 114fe29..79ab13c 100644
--- a/android/apex.go
+++ b/android/apex.go
@@ -989,8 +989,8 @@
 // Function called while walking an APEX's payload dependencies.
 //
 // 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)
+type PayloadDepsCallback func(ctx BaseModuleContext, from blueprint.Module, to ApexModule, externalDep bool) bool
+type WalkPayloadDepsFunc func(ctx BaseModuleContext, do PayloadDepsCallback)
 
 // ModuleWithMinSdkVersionCheck represents a module that implements min_sdk_version checks
 type ModuleWithMinSdkVersionCheck interface {
@@ -1017,7 +1017,7 @@
 		return
 	}
 
-	walk(ctx, func(ctx ModuleContext, from blueprint.Module, to ApexModule, externalDep bool) bool {
+	walk(ctx, func(ctx BaseModuleContext, 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