Is Mobile Request

Slice:	begemot_query_factors
Index:	177
Name:	IsMobileRequest
Group:
Description:	request came from touchsearch (rearr.is_mobile == 1) (https://wiki.yandex-team.ru/users/lpshka/platformfeatures)
Tags:	TG_BINARY TG_DYNAMIC TG_QUERY_ONLY TG_NN_OVER_FEATURES_USE
Authors:	lpshka bochkarev
Responsibles:	lpshka bochkarev