1.1.0: Add support for ATD system images

What's Changed

Enable ATD emulator tags by @ofalvai in #35

This release adds support for creating emulators based on the ATD system images. These are lightweight emulators that offer better performance and stability over regulator emulator images.

At the moment, the images are only available on the canary channel of sdkmanager, so make sure to set the equivalent step input too. ATD system images are not published for every API version and CPU architecture, but here are two working examples (for the full list, run sdkmanager --list --channel=3):

avd-manager@1:
  inputs:
  - tag: google_atd # or aosp_atd
  - api_level: 30
  - abi: x86
  - emulator_channel: 3

avd-manager@1:
  inputs:
  - tag: google_atd # or aosp_atd
  - api_level: 31
  - abi: x86_64
  - emulator_channel: 3

Full Changelog: 1.0.4...1.1.0