Verify uninstall using "pm list".

If we run a test expecting failure, some other part of the test
harness decides that something went horribly wrong and causes a
cascading failure.  Instead, switch to verifying that the package
doesn't appear in pm list.

Bug: 22820380
Change-Id: Ieb315c02c54f12029ef54e4fe83258b50fef8ac9
1 file changed