[Android] Fix @ popup for non-latin chars

[oprudkyi]

#7486

[gaearon]

This seems a bit too broad?

[oprudkyi]

@gaearon
as far as I understand, searchActorsTypeahead now searches in profile titles , so there might be any character (at least on web ui it passes everything down to search fn )

[gaearon]

Yea but we'd probably still want to exclude punctuation? Can we keep this to international alphanumeric?

[oprudkyi]

@gaearon I have updated code
though as for me it is now differs from web ui (web supports punctuation as well)

[oprudkyi]

@gaearon
I forgot to add numerics. Fixed now
current version

  let re = /(^|\s)@([\p{L}\d]*)/giu