[TopAppBar] Color of ActionBar overflow menu background is incorrect

[guillaume-tgl]

Description: The color of the ActionBar overflow menu background is wrong and is not consistent with the color of the overflow menu on regular top bars.

Expected behavior:

The following screenshots were taken from the Catalog demo app.
Regular top bar overflow menu:

Action bar overflow menu:

Android API version: 34

Material Library version: Reproduced with the latest commit to date: a069c4c

Device: Pixel 4a