Add some more logging to DesktopTasksLimiter

As we cannot reproduce the error in the bug, adding some logging to get
more information if this happens again.

Bug: 356143829
Flag: com.android.window.flags.enable_desktop_windowing_task_limit
Test: Build and run
Change-Id: I96d1aeb10de0f8f94084cd1fb483b8822b785c6d