Re-add redundant tint to notification and footer button backgrounds.

This reverts commit 88e9a196f25a675d6f5846a002ea7fbd5fde5f0a.

Reason for revert: b/293749407
Bug: 293749407

Change-Id: I769f5259fb519492c698b1cb4d10d1d79ef77f4e
2 files changed