*RequiredModuleNames functions are available via Module interface

...so that the required module names can be known to other modules

Bug: N/A
Test: m
Change-Id: Ib032b51c4ea4fd77bdebcf09b2d1c2aec1c8eb27

android/module.go

@@ -221,6 +221,10 @@ type Module interface {
 
 	// Get the visibility rules that control the visibility of this module.
 	visibility() []string
+
+	RequiredModuleNames() []string
+	HostRequiredModuleNames() []string
+	TargetRequiredModuleNames() []string
 }
 
 // Qualified id for a module
@@ -887,6 +891,18 @@ func (m *ModuleBase) InRecovery() bool {
 	return m.base().commonProperties.ImageVariation == RecoveryVariation
 }
 
+func (m *ModuleBase) RequiredModuleNames() []string {
+	return m.base().commonProperties.Required
+}
+
+func (m *ModuleBase) HostRequiredModuleNames() []string {
+	return m.base().commonProperties.Host_required
+}
+
+func (m *ModuleBase) TargetRequiredModuleNames() []string {
+	return m.base().commonProperties.Target_required
+}
+
 func (m *ModuleBase) generateModuleTarget(ctx ModuleContext) {
 	allInstalledFiles := Paths{}
 	allCheckbuildFiles := Paths{}
@@ -1877,15 +1893,15 @@ func (m *moduleContext) ExpandOptionalSource(srcFile *string, prop string) Optio
 }
 
 func (m *moduleContext) RequiredModuleNames() []string {
-	return m.module.base().commonProperties.Required
+	return m.module.RequiredModuleNames()
 }
 
 func (m *moduleContext) HostRequiredModuleNames() []string {
-	return m.module.base().commonProperties.Host_required
+	return m.module.HostRequiredModuleNames()
 }
 
 func (m *moduleContext) TargetRequiredModuleNames() []string {
-	return m.module.base().commonProperties.Target_required
+	return m.module.TargetRequiredModuleNames()
 }
 
 func (b *baseModuleContext) Glob(globPattern string, excludes []string) Paths {