Extend Documentation
First of all, thanks to your work, i can rely again on apps, which have something built in, that blocks everything when the app is not installed by the play store.
I think it would be great to extend the documentation a bit, because for example i had to copy the permissions with the name privapp-permissions-com.android.vending.xml. Or that i had to create the /system/etc/default-permissions folder first. (Just simple things, but would have made a few hours easier for me