feat(google-maps): allow ability to update bounds in GroundOverlay

[thomasdmitchell]

Feature Description

Allow the ability to update the bounds of a GroundOverlay.

Use Case

Currently it updates opacity, URL so I think it would be useful to allow bounds to update if possible

[crisbeto]

This came up when I added the ability to update the other properties. Here's the relevant discussion #19306 (comment)

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