Fix StaleObjectException

Some of the methods in HealthConnectAllAppPermissionFragmentTest are
throwing StaleObjectException.

This happens because we're trying to click on an object while our screen
is still transitioning between windows.

To solve this, wait for the window transition to complete before trying
to click.

Fix: 296125698
Test: atest HealthConnectAllAppPermissionFragmentTest
Change-Id: I8e7a0e1544b21b9f07c5a4ed7d3ba0e6c76fd5ab