Merge "Update workspace text shadow according to new specs." into sc-dev am: b1754bfc06 am: feb62274c8 am: b90a48df7a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14494140

Change-Id: Idfa3e55af6fe3abcfeb9732734079fd6acfd3e76