Merge "Fix folders being light in dark mode." into sc-dev am: 5546b258c3 am: e7ce4caaed

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15082515

Change-Id: If2d9eb7e3df87243c1ae6e0304bec64a4c82bcd2