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