Google Camera has just been updated to version 7.3.017 on the Play Store. A new report allegedly based on a teardown of its APK specifies the ability to record at 24 frames per second (fps). This option may pertain to upcoming phones such as the Pixel 4a series, which may also have cropped up in this code.
https://www.notebookcheck.net/The-latest-Google-Camera-app-update-allegedly-hints-at-new-24fps-feature.451329.0.html