Merge "Delaying initializing "is launcher3" flag" into sc-dev am: 3941bc65e3 am: fdcc06cd4a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14793019

Change-Id: I8d938e0a381d87f97e97328c1ffd06772d00b778