kerplapp repos should always include FDroid
|Target version:||swap repos with Bluetooth and Bonjour|
at the very least, a repo should include FDroid so people can get updates from each other with minimal effort.
add Activity to choose which installed apps are in the local repo
This gets the data about which apps are installed from the ContentProvider
that pserwylo recently added for data about "Installed Apps" and presents
a list view for the user to select from by touching each line. Then if the
user chooses "Update Repo", it will regenerate the local repo based on the
current selection. It will always include FDroid in the local repo.