Better identify Android (beta) versions

The problem is that we are currently promoting the beta version to production.

So we have no way to distinguish a beta version from a production one, because if we were adding a -beta suffix to a version it would appear in production.

Possible solutions:

1/ Append the versionCode to the versionName

For instance, for the 1.5.0 version we would have:

• beta 1 = 1.5.0-21
• beta 2 = 1.5.0-22
• beta 3 = production = 1.5.0-23

2/ Upload a separate APK for production

Allowing to have different version names for beta and production, for instance:

• beta 1 = 1.5.0-21-beta
• beta 2 = 1.5.0-22-beta
• beta 3 = 1.5.0-23-beta
• production = 1.5.0