Angry Birds has landed on the Switch, @ChanseyIsTheBest brought a new Homebrew, a wrapper for Fusion Engine, so using your legally acquired APK you can extract the executable and assets then with the NRO you can run it on your console
By the way, the instructions say to put the NRO, .SO, and assets on the SDMC:/switch folder but should be SDMC:/switch/AngryBirds another think, you must use a APK with the ARM 64 binaries, the [B]armeabi-v7a[/B] DO NOT WORK