Android A11Y: Fix deadlock in QtAndroidAccessibility::runInObjectContext()

On android the event loop is normally blocked, when the application
is suspended, e.g. when it enters the background or when the screen is
locked (see android.app.background_running). This leads to a problem
when we try to process events after this happens, e.g. when android
sends us an ACTION_CLEAR_ACCESSIBILITY_FOCUS event after the event loop
is suspended. While handling it we eventually call
QtAndroidAccessibility::runInObjectContext() which tries to do a
blocking call on the object context, however, with the event loop being
suspended we run into a deadlock which leads to an ANR.  So we need to
make sure to never make a blocking call while the event loop is
suspended.

Task-number: QTBUG-102594
Pick-to: 6.4 6.3 6.2 5.15
Change-Id: I33f0440a3da84fb4bdae5ab0fc10d514c73f23ad
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

0 files changed, 0 insertions, 0 deletions