Fix: FATAL exception during Autonomus group creation failure

Failure in forming an autonomus group causes FATAL IllegalArgumentException
exception as deviceAddress will be empty in mPeersLostDuringConnection.

Added check to verify if it is autonomus group before trying to remove
any peer or clear device list.

Change-Id: I486463782e85c7f0031b6f62ec5aaf8afb11b652
CRs-fixed:554767
(cherry picked from commit 55bb4f6dd9fc3e5c8aa7c8bc8ece01f0603e0a83)
(cherry picked from commit 3dbbf14276a403841e1d69cd2624dfad74d6f540)
(cherry picked from commit 8642fcd59686e54c1ea215016bfa7562d17b27c0)