Update Task minWidth/Height when base Intent is changed

Similar to Task#mResizeMode, update minWidth/Height when the root
activity is changed.

Bug: 416987720
Test: atest WmTests:TaskTests
Flag: com.android.window.flags.update_task_min_dimensions_with_root_activity
Change-Id: I8d05369a439d6102241c50a9f42dfb5262672538