Revert "App ops"

This reverts commit 39f2f18b5bd43318a95f0bd21eca99dbe060f2de.

We don't need this custom implementation. Privacy guard have App ops now!

Conflicts:
	res/xml/settings_headers.xml

Change-Id: I6814d34a198f8fe5f8032feb14e7d184e09e437a