Enable ATD emulator tags

[ofalvai]

Checklist

• I've read and followed the Contribution Guidelines
• step.yml and README.md is updated with the changes (if needed)

Version

Requires a MINOR version update

Context

Enable creating ATD emulator images. More info about ATD:

https://android-developers.googleblog.com/2021/10/whats-new-in-scalable-automated-testing.html
https://developer.android.com/studio/preview/features#dolphin-testing

Changes

Adds new options to the tag step input: aosp_atd and google_atd. These are passed on to the sdkmanager call.

Investigation details

The ATD variants are not published for every CPU architecture and API version, and --channel=3 is also required to install these images. At the moment these are the valid step input combinations to install an ATD image:

avd-manager:
  inputs:
  - tag: google_atd
  - api_level: 30
  - abi: x86
  - emulator_channel: 3

avd-manager:
  inputs:
  - tag: google_atd
  - api_level: 31
  - abi: x86_64
  - emulator_channel: 3

avd-manager:
  inputs:
  - tag: google_apis
  - api_level: 32
  - abi: x86_64
  - emulator_channel: 3

Decisions

[BirmacherAkos]

@ofalvai I'd suggest updating the description of the related step inputs.

[lpusok]

Do you want to maybe add an e2e test case for a slim image?

[ofalvai]

@lpusok I'm not sure, I'd rather not add a test for an unstable feature. And emulator E2E tests are already flaky enough, I think in this case the pain would be bigger than the benefit.