Build the apk with dynamic version name

[matt989253]

Your feature in two sentences

The apk's version name should be the last commit's date, using the following format: yyyy.mm.dd-hh:mm

Description

This is done to more easily understand which apk version has been built and when

Deliverable

• The updated build.gradle file

Schedule

Estimated time : 30m
Actual time : 20m