Added audio/source tags for message notifications.
Added audio/source tags for message notifications.

Signed-off-by: Andrew Johnson <0db288aaa231994aef39fb31f3ddea4c01f8d88d@draster.com>

vector-im/riot-web,vector-im/riot-web,KentShikama/vector-web,vector-im/vector-web,KentShikama/vector-web,vector-im/riot-web,vector-im/vector-web,KentShikama/vector-web,vector-im/vector-web,martindale/vector,KentShikama/vector-web,martindale/vector,KentShikama/vector-web,vector-im/vector-web,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web,vector-im/riot-web,KentShikama/vector-web