Make clipboard overlay always nonfocusable

Interim fix while we determine how to handle the focus correctly
for CTS tests.

Bug: 219067941
Bug: 218534156
Fix: 219067941
Fix: 218534156
Test: manual
Change-Id: If9f2d3801c77731b606ff9ce7af731e3dec2e04e

packages/SystemUI/src/com/android/systemui/clipboardoverlay/ClipboardOverlayController.java

@@ -151,11 +151,7 @@ public class ClipboardOverlayController {
         mWindow = FloatingWindowUtil.getFloatingWindow(mContext);
         mWindow.setWindowManager(mWindowManager, null, null);
 
-        if (!mAccessibilityManager.isTouchExplorationEnabled()) {
-            setWindowFocusable(true);
-        } else {
-            setWindowFocusable(false);
-        }
+        setWindowFocusable(false);
 
         mContainer = (FrameLayout)
                 LayoutInflater.from(mContext).inflate(R.layout.clipboard_overlay, null);