Merge "Updated launcher text shadow values." into sc-dev am: 64fc7543f0 am: 696bf75c74

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14204932

Change-Id: Ib8d1b17982eaad9957424c1a92bc8528b320d3dc