android-ceylon: Fix import issue by blacklisting android.jar/rt.jar overlap

When trying to import java.lang { String }, ceylon was unable to resolve
that to a type, since java.lang was coming from both rt.jar and
android.jar. To solve this, I generated a listing of what was present in
my rt.jar and am using it to blacklist files in the blob jar step.

TODO: autogenerate listing of rt.jar.
android: Remove unnecessary optional types, try out String[] integration
android: Python test works!!