PackageManager: allow build-time disabling of components

Allow components to be specified as disabled at build time
(applied on boot).

This allows stock OTA components to be marked as disabled in
Slim builds.

Change-Id: I6e4499cc40a779792a5ea97a10137399dad7d69f
Privacy Guard Slim version (1/2)

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

Change-Id: If57de2b541fa6b0a590fd65e8664bf173e259035