Event server / fbstream merge

Change-Id: Iaad2789739c16af4fce3ce9cb79cb945a5cc9068
Fix and finish fbstream/event-server merge

* vm now sends a vm ready
* declare sdcard manifest permission for the webrtc trace file
* signalling channel json fixup for ICE candidates
* update to working fbstream libjingle_peerconnection library

Change-Id: I99d7fcc033327d71d2d0660fd22d9a35441f6f79
Strip libjingle .so to save 70MB on /system

Change-Id: I9e241e3eb2bbd207fde460f08aabc9ae21bd5959
Workaround to stop video stream on client disconnect

The merging of fbstream and the event server left us with no way to
stop sending video when a client disconnects. Previously, the event
server would send a BYE message to the separate fbstream, after which
fbstream would exit and restart. Since we can't do that anymore and I
still haven't figure out the right way to tell webrtc to stop, this
patch has the event server itself exit and get restart by Android.

Change-Id: Iebb1fbdf0cb4645a8ca43a157b194188894e509d