Delete obsolate build.properties file.

Change-Id: I6492d840c8036dbe28547cbd49a702883d272038
Correct ANT build and property files.

Change-Id: Id91fa08a4190c572a5fd0f6e6bedf672df28b0e0
Remove unused package import.

Change-Id: Ib6f9ede4258e2ef009fc6ed953be291739cef6a6