Only update the compat system UI visibility if the source is valid

If two insets source consumers handle the same public type (like
navigation bar and taskbar both provide Type.navigationBars()), one has
a valid source but the other one doesn't, we should only let the one
with the valid source update the compat system UI visibility.

Bug: 232327949
Test: atest WindowInsetsControllerTests\
      #testSystemUiVisibilityCallbackCausedByInsets
Change-Id: I07b35f488c5af273cafaf4a8a41f0a51365038a0