Fix split black if active from pip

When expand from pip, it should set task bounds to null because
split always controls split root task bounds rather than child
task bounds.

Fix: 208174939
Test: manual
Test: pass existing tests
Change-Id: I6e391442049db9eda0c44f97e3d62ed04616cb93

libs/WindowManager/Shell/src/com/android/wm/shell/pip/PipTaskOrganizer.java

@@ -1255,11 +1255,7 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
         } else if (isOutPipDirection(direction)) {
             // If we are animating to fullscreen or split screen, then we need to reset the
             // override bounds on the task to ensure that the task "matches" the parent's bounds.
-            if (direction == TRANSITION_DIRECTION_LEAVE_PIP_TO_SPLIT_SCREEN) {
-                taskBounds = destinationBounds;
-            } else {
-                taskBounds = null;
-            }
+            taskBounds = null;
             applyWindowingModeChangeOnExit(wct, direction);
         } else {
             // Just a resize in PIP