Enable defaults in soong_config_module_type props

Test: go tests
Test: m
Change-Id: I8fe8c17320086034f4745b2da974a2c73c949eaf

android/defaults.go

@@ -95,6 +95,8 @@ func InitDefaultableModule(module DefaultableModule) {
 	module.setProperties(module.(Module).GetProperties(), module.(Module).base().variableProperties)
 
 	module.AddProperties(module.defaults())
+
+	module.base().customizableProperties = module.GetProperties()
 }
 
 // A restricted subset of context methods, similar to LoadHookContext.