Add Android 12 emulator to make sure tests are verified
on a recent Android release. Android 12 has only x64 emulator
version from sdkmanager and x86_64 is better in any case.
This patch only adds the emulator, but doesn't enable its use,
that is done under another patch.
Task-number: QTQAINFRA-4748
Task-number: QTQAINFRA-4733
Change-Id: Ic1569fb1afa5b2d02e6eadea1d9a8eac0a378d98
Reviewed-by: Rami Potinkara <rami.potinkara@qt.io>
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>
b7ea626a07