Autoclick: Close scroll panel in test

In some test execution flakes the scroll panel doesn't close on its own
after the test completes so explicitly close it before the test ends.

Bug: 423981983
Test: AutoclickClickTypeTests
Flag: com.android.server.accessibility.enable_autoclick_indicator
Change-Id: Ic56eea209836885280bdb3512293f1e1e4cc6e3d