Telecomm: Use proper bit for Voice privacy

in new code, DISCONNECT_FROM_CONFERENCE is introduced newly and is using
same bit as voice privacy and hence disconnect option not showing up
for conference. Hence use a different bit for voice privacy

CRs-Fixed: 738068
Change-Id: I80b7ae7b24ac096dc5bf5abd044bcd8020d06c1d
1 file changed