Have ConvertWBp2build use Bp2buildMutatorContext

This no-op refactoring facilitates some upcoming functional changes for
"bp2build allowlist v2". The work requires that the bp2build conversion
mutator be changed from a TopDown mutator to a BottomUp mutator.
Refactoring all bp2build-related methods so that they use Bp2buildMutatorContext
makes it easier to make this functional change without touching tens of
files and multiple projects.

Bug: 285631638
Test: m bp2build
Change-Id: I3d1ef3064146e959c6f0dc315350fc9764bf2bd2
diff --git a/aconfig/aconfig_declarations.go b/aconfig/aconfig_declarations.go
index ed0961b..f19ddb8 100644
--- a/aconfig/aconfig_declarations.go
+++ b/aconfig/aconfig_declarations.go
@@ -168,7 +168,7 @@
 	Package string
 }
 
-func (module *DeclarationsModule) ConvertWithBp2build(ctx android.TopDownMutatorContext) {
+func (module *DeclarationsModule) ConvertWithBp2build(ctx android.Bp2buildMutatorContext) {
 	if ctx.ModuleType() != "aconfig_declarations" {
 		return
 	}