Since latest version of Qt need Android
target sdk 29 the qt direct storage access
doesn't work because a new scoped storage
access way has been introduced. This flag
allow to have current storage access
way to work again (but is limited to
target sdk 29 only)
Pick-to: 5.15 6.1
Fixes: QTBUG-92239
Change-Id: If0d0af7c171de4b3e8bb8dd9a88fd61b65d1c839
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>