build(deps): switch back to upstream setup-android

[mikehardy]

This was originally to bring in a more up-to-date command-line tools, fixing
the bundled sdkmanager's problems with JDK11. The best action in the community
was not quite up to date so I made a local change, but now the PR is merged and released,
so back to upstream, excellent

See android-actions/setup-android#272

Test plan: make sure there are no instances of my fork ref left over, and CI passes:

mike@bistromath:~/work/AnkiDroid/Anki-Android-Backend (upstream-setup-android) % grep -r setup-android .github/workflows/
.github/workflows/update_gradle_wrapper.yml:      uses: android-actions/setup-android@v2
.github/workflows/windows_build.yml:      uses: android-actions/setup-android@v2
.github/workflows/windows_pure_build.yml:      uses: android-actions/setup-android@v2
.github/workflows/robolectric_build.yml:      uses: android-actions/setup-android@v2
.github/workflows/robolectric_build.yml:      uses: android-actions/setup-android@v2
.github/workflows/macos_build.yml:      uses: android-actions/setup-android@v2
.github/workflows/macos_build.yml:      uses: android-actions/setup-android@v2
.github/workflows/publish_testing.yml:      uses: android-actions/setup-android@v2
.github/workflows/publish_library.yml:      uses: android-actions/setup-android@v2
.github/workflows/linux_build.yml:      uses: android-actions/setup-android@v2
mike@bistromath:~/work/AnkiDroid/Anki-Android-Backend (upstream-setup-android) %