Revert: Privacy Guard Slim version (2/2)

Re-implements slims ehanced privacy guard from 4.3
and adapt it to 4.4 changes

Change-Id: Ie87a72b4212e5a8063c1dfbf7fd759f3a14a0d12 (reverted from commit 649151347668cd15adf1636f38d488e064ccfb2b)