Relaunch the activity with current configuration to avoid flakiness

The activity was relaunched with empty configuration, which
unfortunately reset the SCREENLAYOUT_COMPAT_NEEDED bit of
the app’s configuration. Therefore, the later test failed
while comparing the configuration between the app and the activity.

Bug: 295234586
Test: attest ActivityThreadTest
Change-Id: Id667768cf345136038ab1d626141a014d2f1e616