Initial adaptive icon support

Before this QuteLauncher was crashing in Android O or newer due to an impossible cast to BitmapDrawable, this fixes that problem.

This adds initial support for adaptive icons, there is no mask applied to them yet. They will show up as an square for now.

Animation

• Updated animation.
• Added config module.

Flavors

Added 2 different flavors.

Full has push notification, crash reports and analytics.

Analytics

• Updated project to use gradle.
• Added Firebase Analytics.

Transparent Bars

Added transparent status bar and transparent navigation bar.

Also, the wallpaper is not retrieved anymore as a separate image, the application itself is transparent and Android paints the wallpaper behind it.

Better grid layout

Code cleanup and better grid layout, add loading icon.

Initial version

Simple vertical grid layout.