fw: Fix protected apps implementation.

 Currently a protected component could be accessed
 from any other means other than the launcher, entirely
 defeating its purpose. Instead, hook into the activity
 stack supervisor and quelch attempts at invocation
 of protected components.

 This implementation also provides feedback to the user
 on any attempt to start the component when its in a
 protected state.

TICKET: CYNGNOS-84
Change-Id: Ib0165e7504adb08e21e9566c7394b37dffd280d4