Allow module types to force creation of a default APEX variant

Bug: 187910671
Test: m droid
Change-Id: I797d4ab60d15b526744fe6e4df1b55c8b75b0310

cc/cc.go

@@ -3279,6 +3279,12 @@ func (c *Module) ShouldSupportSdkVersion(ctx android.BaseModuleContext,
 	return nil
 }
 
+// Implements android.ApexModule
+func (c *Module) AlwaysRequiresPlatformApexVariant() bool {
+	// stub libraries and native bridge libraries are always available to platform
+	return c.IsStubs() || c.Target().NativeBridge == android.NativeBridgeEnabled
+}
+
 //
 // Defaults
 //