Prepare for Atmosphere Javascript 2.0 (#12241)

* Atmosphere 2.0 has changed enableProtocol to default to true.
* Reopening a connection in Atmosphere 2.0 is signalled through an onReopen event (not present at all in Atmosphere 1.0.x)

Fix was backported from master

Change-Id: I6ed258087a0b3a06440ab9d19b621560fa4f998f
Merge: no