Qt 6.7 has the minimum supported Android version as 8, this applies
that to the CI as well.
Pick-to: 6.7
Task-number: QTBUG-111919
Change-Id: Id4c9eda29f1b61bf739eae3624b07f44a893cfae
Reviewed-by: Rami Potinkara <rami.potinkara@qt.io>
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>