Fix flaky AccessibilityMagnificationTest The failure is due to the screenshot window is still visible on the screen and it is a focused window. It leads to unexpected active window. To fix it we broadcast close-system_dialog intent to close the screenshot window. Bug: 189723605 Test: atest CtsAccessibilityServiceTestCases Change-Id: Ib80a39b7d88d199744932a5888d26f54802e2800