Propagate aconfig providers for more modules.

Bug: 308625757
Test: manual
Change-Id: Iaf6d45a4259f1c6c34476c34c431344283ae2830

etc/prebuilt_etc.go

@@ -155,6 +155,9 @@ type PrebuiltEtc struct {
 	additionalDependencies *android.Paths
 
 	makeClass string
+
+	// Aconfig files for all transitive deps.  Also exposed via TransitiveDeclarationsInfo
+	mergedAconfigFiles map[string]android.Paths
 }
 
 type Defaults struct {
@@ -365,6 +368,7 @@ func (p *PrebuiltEtc) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		symlinks:       p.properties.Symlinks,
 	}
 	p.addInstallRules(ctx, ip)
+	android.CollectDependencyAconfigFiles(ctx, &p.mergedAconfigFiles)
 }
 
 type installProperties struct {
@@ -433,11 +437,16 @@ func (p *PrebuiltEtc) AndroidMkEntries() []android.AndroidMkEntries {
 				if p.additionalDependencies != nil {
 					entries.AddStrings("LOCAL_ADDITIONAL_DEPENDENCIES", p.additionalDependencies.Strings()...)
 				}
+				android.SetAconfigFileMkEntries(p.AndroidModuleBase(), entries, p.mergedAconfigFiles)
 			},
 		},
 	}}
 }
 
+func (p *PrebuiltEtc) AndroidModuleBase() *android.ModuleBase {
+	return &p.ModuleBase
+}
+
 func InitPrebuiltEtcModule(p *PrebuiltEtc, dirBase string) {
 	p.installDirBase = dirBase
 	p.AddProperties(&p.properties)