Merge "Revert "[Search][Motion] Separate AllApps scrim and content interpolation"" into sc-dev am: 1b195c9ff4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14316411

Change-Id: Ie8c13863edfaef940bdc195e6e2ab78089e376b9