Make compat-config to generate output files too

Flag: EXEMPT host test change only
Bug: 367706429
Test: m nothing --no-skip-soong-tests
Test: `m ravenwood-runtime` and make sure out/host/linux-x86/testcases/ravenwood-runtime/ravenwood-data/
    has framework-platform-compat-config.xml and services-platform-compat-config.xml
Change-Id: I92b545c480890815cd886b8ecf50ed99ffe7eea1
diff --git a/java/platform_compat_config.go b/java/platform_compat_config.go
index 67ed84e..5b145c6 100644
--- a/java/platform_compat_config.go
+++ b/java/platform_compat_config.go
@@ -110,6 +110,7 @@
 	p.installConfigFile = android.PathForModuleInstall(ctx, "etc", "compatconfig", p.configFile.Base())
 	rule.Build(configFileName, "Extract compat/compat_config.xml and install it")
 	ctx.InstallFile(p.installDirPath, p.configFile.Base(), p.configFile)
+	ctx.SetOutputFiles(android.Paths{p.configFile}, "")
 }
 
 func (p *platformCompatConfig) AndroidMkEntries() []android.AndroidMkEntries {