1. Fixed the case where runtime permissons can be toggled by a
developer via a system property.
2. Relaxed the runtime permission XML parsing to be more fault
toelrant and consistent wiht the reset of the package manager
parse code.
3. Fixed a deadlock due to calling in to the activity manager
with the package manager lock held to kill an app.
Change-Id: I11dfb57ad4d8119baea79227dc2a3fe5e2208515
12a692a5e8