Adding Search to Add Friends to Call

[mattbaseball]

Is your feature request related to a problem? Please describe.
Right now in order to add a third member to the call, the user would have to scroll through their friends and find them. Once people have 20+ friends it could become relatively annoying to add a friend to a call. Introducing a search bar would be a great addition so that people can find the friend they want to add much easier.

Describe the solution you'd like
A search bar for when you're adding a new member to the call.

Describe alternatives you've considered
A start group call button in the friends section where the user can select multiple members that are part of the call from the beginning.