Remove FLAG_SPLIT_TOUCH from launcher code

The splitting behaviour is now permanent, so this flag is deprecated and
it's no longer necessary to set it.

Bug: 239934827
Test: TEST=inputflinger_tests; m $TEST && $ANDROID_HOST_OUT/nativetest64/$TEST/$TEST
Flag: NONE removing flag
Change-Id: Ie7dafaeffdb6f5854a61e6ece0217d8bf5e496af
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 018903e..6ea0a2b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -666,8 +666,7 @@
      */
     public WindowManager.LayoutParams createDefaultWindowLayoutParams(int type, String title) {
         int windowFlags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
-                | WindowManager.LayoutParams.FLAG_SLIPPERY
-                | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH;
+                | WindowManager.LayoutParams.FLAG_SLIPPERY;
         boolean watchOutside = isTransientTaskbar() || isThreeButtonNav();
         if (watchOutside && !isRunningInTestHarness()) {
             windowFlags |= WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
diff --git a/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayController.java b/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayController.java
index 675d55b..de20f77 100644
--- a/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayController.java
@@ -200,7 +200,7 @@
     private LayoutParams createLayoutParams() {
         LayoutParams layoutParams = new LayoutParams(
                 TYPE_APPLICATION_OVERLAY,
-                LayoutParams.FLAG_SPLIT_TOUCH,
+                /* flags = */ 0,
                 PixelFormat.TRANSLUCENT);
         layoutParams.setTitle(WINDOW_TITLE);
         layoutParams.gravity = Gravity.BOTTOM;