Purpose

Build and deploy android builds of the wallet.

Changes

Add job to the release flow, that builds the wallet for android, and pushes it to an internal track on play store.

Draft

The flow is unable to succeed, because the following secrets have not been added:

• ANDROID_PACKAGE_NAME
• GOOGLE_SERVICE_ACCOUNT_KEY

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• [] (If necessary) I have updated the CHANGELOG.