Does hanging pictures of animate beings inside the bathroom—it being the dwelling of jinn—expel the angels from the entire house, or does it not affect the angels' entry?

Depicting animate beings in 3D is forbidden by consensus. The majority of scholars forbid drawing animate beings by hand. As for photographic imaging (capturing a shadow), there is a difference of opinion, and the view that it is not forbidden is more apparent.

The reason for prohibiting hanging pictures is not only because they prevent angels from entering. The notion that the bathroom is a dwelling for jinn is not established. The entry of angels is prevented by the presence of pictures or dogs in the house, not jinn.

So, if the pictures are forbidden, it is absolutely impermissible to hang them. If they are photographic, it is preferable not to keep them except out of necessity. Hanging pictures in the bathroom might not prevent angels from entering the house if the bathroom is separate. However, if it is part of the house, it appears that it would prevent them.