Pause page scrolls while new recommendation are being applied

http://screencast/cast/NDg4NzU2MjI3NDQ3MTkzNnw5MTU1NTc4Yy1lYw
http://screencast/cast/NDk5Nzg4MzQ5MjMwMjg0OHxmZGM0MGZlYS0wMg

This cl is NO-OP for anything else using it already. Just renamed it.

Bug: 318410881
Test: Manual (see screencast)
Flag: ACONFIG com.android.launcher3.enable_categorized_widget_recommendations DEVELOPMENT
Change-Id: I55d599437b2554f58d635d11f2b603516b030f30