Merge "Read the starting surface icon size from framework" into sc-dev am: 630efccd7a am: 7f9488dcf2 am: 10247d75c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14609921

Change-Id: I76961f5f5ef54f6218471034aab5d13b680945c0