Make constructor visible for tests Make all fields final (no setters, so already effectively final) Remove mHasStatusBar and mHasNavBar (unused) Remove overload 'takeScreenshot' method without a source param Added missing @IntDef annotations to parameters Bug: 231957192 Test: atest ScreenshotHelperTest SystemActionPerformerTest Change-Id: Ief43bd0ba50dafac720ae18d00c3c99b8d31e2e1