Why was the audio group's gid changed? My understanding is that the Android kernel has hardcoded GIDs, not hardcoded names, so if we have to use those, we could certainly prefix the group names on the Ubuntu side to avoid name collision.
However, I agree with Colin that having those in the range reserved for user groups is problematic. One solution would be to move the user range to higher values (making the user/group IDs on touch devices start at 10000) which would avoid any potential clash but would lead to a difference in uids/gids between standard ubuntu and ubuntu touch.
Why was the audio group's gid changed? My understanding is that the Android kernel has hardcoded GIDs, not hardcoded names, so if we have to use those, we could certainly prefix the group names on the Ubuntu side to avoid name collision.
However, I agree with Colin that having those in the range reserved for user groups is problematic. One solution would be to move the user range to higher values (making the user/group IDs on touch devices start at 10000) which would avoid any potential clash but would lead to a difference in uids/gids between standard ubuntu and ubuntu touch.