Add a preference item to show a dialog window containing the list
of files received via Bluetooth. This replaces the "live folder"
view that was available in Gingerbread and earlier.
Bug: 3167219
Change-Id: I703266dba47c9ef8c52e5569aba0f812a9511bb5
Close the scan screen after successful pairing, and remove a
device from the list of paired devices after unpairing.
As part of the fix, BluetoothSettings was refactored into a parent
class, DeviceListPreferenceFragment, and three subclasses for each
variant type: BluetoothSettings, BluetoothFindNearby, and
DevicePickerFragment, replacing the checks against mScreenType with
custom logic in the child classes.
Bug: 3325848
Change-Id: If64fddc3ba5b4f1136451491c7d5a1139b696e47
