## Description
Dependabot does not support (yet) upgrading the Gradle wrapper thus it
needs to be updated/upgraded manually.
## Changes:
* Upgrade gradle wrapper to version `8.5`
See also: https://github.com/dependabot/dependabot-core/issues/2223
## Description:
Refactor gradle build files to use Kotlin DSL instead of Groovy.
There were also a bash script and a python script that needed to be
updated because they relied on parsing the `build.gradle` files written
in Groovy.
This PR completes the work started in:
https://github.com/syncthing/syncthing-android/pull/2000