Fix crash when doing conferencing over Wi-Fi
Fix crash when doing conferencing over Wi-Fi

The problem was that we were calling Connection.getAudioState
in the conferencing code. This led to a null pointer exception.

Fix was to add a null pointer check.

BUG: 21957102
Change-Id: Ibad0f6cc70a5bc4a30023beb857125802bc35cd4

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base