Typing notifications unnecessarily lose information

If two people are typing to you at the same time in a room, the UI now says 'Bob and 1 other are typing' (or similar). This is frustratingly ambiguous given saying 'Bob and Alice are typing' would generally take up less room and be way more useful and meanungful. The '...and N others' should only kick in if N>1.

Start by locating the iOS UI that formats typing notifications and reproduce the case with two people typing in one room. Done means both names are shown directly when exactly two people are typing, while an “and N others” form is used only when more than two people are typing.

Written by the indexing model from the issue text.