Add non-dynamic time format

Version

Briar 1.2.9

Android version

Android 10

Description

Currently, Briar only displays a dynamic time format when messages are sent and received.

It would be very good if a non-dynamic time format could be added, but it uses almost the same structure as dynamic time format.

An example would be MMM dd, yyyy, hh:mm a

Sep 3, 2020, 01:00 PM