Dismiss immersive dialog when running test

Test runs in immsersive mode which will show a user dialog. Run the
shell command to dismiss at the start of the test

Bug: 313674425
Test: SurfaceControlViewHostTests#requestFocusWithMultipleWindows
Change-Id: Ieae68a2ebd798483f5e0d600361baad96d053592
1 file changed