create, but dont register, bp2build_deps mutator

This is the bulk of the "allowlist v2" feature. It will disable bp2build
generation for modules which have transitive dependencies without a
bazel build definition.

This CL includes this mutator, but doesn't register it as a bp2build
mutator (outside of a few unit tests). This allows us to easily iterate
on completion of this feature and ensure there are no launch blockers
before we finalize the change in AOSP.

Bug: 285631638
Test: Unit tests
Change-Id: Ifb0a079c409ca19b02cafa3fab2efa0d3deebc50

android/api_domain.go

@@ -14,12 +14,6 @@
 
 package android
 
-import (
-	"github.com/google/blueprint"
-
-	"android/soong/bazel"
-)
-
 func init() {
 	RegisterApiDomainBuildComponents(InitRegistrationContext)
 }
@@ -97,13 +91,3 @@ const (
 func ApiContributionTargetName(moduleName string) string {
 	return moduleName + apiContributionSuffix
 }
-
-// For each contributing cc_library, format the name to its corresponding contribution bazel target in the bp2build workspace
-func contributionBazelAttributes(ctx TopDownMutatorContext, contributions []string) bazel.LabelListAttribute {
-	addSuffix := func(ctx BazelConversionPathContext, module blueprint.Module) string {
-		baseLabel := BazelModuleLabel(ctx, module)
-		return ApiContributionTargetName(baseLabel)
-	}
-	bazelLabels := BazelLabelForModuleDepsWithFn(ctx, contributions, addSuffix)
-	return bazel.MakeLabelListAttribute(bazelLabels)
-}