Fix task is blank in multi-window when IME show

Apply alignToAdjustedBounds to child tasks when setAdjustedBounds in
ActivityStack.

Bug: 146217357
Test: atest SplitScreenTests CrossAppDragAndDropTests
Test: split window, launch app with edit text align bottom on second
window, lunch IME.

Change-Id: I81f7282914a5a001c494b9bc589a93d66558b1d7

services/core/java/com/android/server/wm/ActivityStack.java

@@ -3986,6 +3986,7 @@ class ActivityStack extends WindowContainer<WindowContainer> implements BoundsAn
             final PooledConsumer c = PooledLambda.obtainConsumer(Task::alignToAdjustedBounds,
                     PooledLambda.__(Task.class), adjusted ? mAdjustedBounds : getRawBounds(),
                     insetBounds, alignBottom);
+            forAllTasks(c);
             c.recycle();
         }