Revert "Implement scrim method"

This reverts commit 904c429b9998c96476ab5026bc04e7242d559f8d.

Bug: 130451254
Test: manual

Reason for revert: found a better way to extract scrim colors without going through OverviewProxy

Change-Id: I435b7b20f87fbf2fc4e6b7415b981ce2fa4f8eab
2 files changed