Promote stable close app tests to presubmit

These flaky tests have been stable for the past week and can be promoted

Test: atest FlickerTests:com.android.server.wm.flicker.close
Bug: 171049778
Bug: 171049647
Bug: 167521849
Change-Id: Ic7e45a27120f69b4a4d5e5ca9266809fcd969939