Fix RecyclerView.disableAnimation() crash

[joshliebe]

Task/Issue URL: https://app.asana.com/0/488551667048375/1207526694527888/f

Description

• Fix for an IllegalArgumentException when re-arranging the favorites grid (By checking isComputingLayout before updating the itemAnimator in a post)
• Also updates enableAnimation with the same logic.

Steps to test this PR

• [ ] Add at least two favorites.
• [ ] Re-arrange the favorites grid.

[joshliebe]

• #4643 👈
• develop

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