Change SELinux neverallow tests to be sepolicy-analyze based.

Change I47c16ccb910ac730c092cb3ab977c59cb8197ce0 added support to
sepolicy-analyze for checking the SELinux policy binary for neverallow rule
violations.  This offers an improvement over the current tests, since this now
checks the entire policy rather than just the components which are extracted
from the AOSP policy.  Remove the old tests and replace them with the new.

Bug: 18004296
Change-Id: Iefe508df265f62efa92f8eb74fc65542d39e3e74