Minor app updates: F-Droid submission and adding of shortcuts menu.

Items addressed:

* #2 - Submission to F-Droid requires `DependencyInfoBlock` to be not present in built APK, therefore changes to `app/build.gradle.kts` are required;
* #4 - Introducing shortcuts menu - it will be used when web app will support interpreting `GET` parameters.

Included web app version: [v1.3.0](https://source.gyt.is/inretio/bouncing-logo/releases/tag/v1.3.0).