simplify the fragments

killing slidingpane for now for a single fragment
ui to reduce complexity.
fixup the activity/service interactions to get it
functioning again.

Change-Id: Iaf21aa8740301f5d9264b15e75a93cfec5dc27a3
use handler looper for wifidirectmanager

Change-Id: Ibad60e32ee31818451c2e9e6a680539575f2bae3
abstract the fileserver and make it a runnable

Change-Id: I6c1079b8bda10f3dbf7eb24b100812224dd22a04