Merge "Set IconView drawable size for SplitPlaceholderView" into sc-v2-dev am: 9bd2802c9b am: 4dabbaa184

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15780634

Change-Id: Idfc173f046fa2b6ae9ab5167b50114754055765c