Remove API that snuck into MockPackageManager

We didn't release the get/setPackageObbPath API, but it snuck into
MockPackageManager. However, it is not usable as a developer anyway.
Removing it so it doesn't stay in the API forever.

Cherry-pick from gingerbread

Change-Id: I2083a8f398d983d53661c33270854442e34f9bc9
5 files changed