Export: phonyFactory -> PhonyFactory

When adding aidl_interface, the intention is to
have module name 'foo' create modules 'foo-cpp'
and 'foo-java' for consistency. I'm using a phony
module to reserve 'foo' as a name for future use
and also for sanity.

Bug: 111117220
Test: create a phony module using the factory and use it to build
Change-Id: Ib3214acb9b4bf48aa60a1a3c20b5d12129d1c3a6

phony/phony.go

@@ -23,7 +23,7 @@ import (
 )
 
 func init() {
-	android.RegisterModuleType("phony", phonyFactory)
+	android.RegisterModuleType("phony", PhonyFactory)
 }
 
 type phony struct {
@@ -31,7 +31,7 @@ type phony struct {
 	requiredModuleNames []string
 }
 
-func phonyFactory() android.Module {
+func PhonyFactory() android.Module {
 	module := &phony{}
 
 	android.InitAndroidModule(module)