Merge "Delaying initializing "is launcher3" flag" into sc-dev am: 3941bc65e3 am: 8553d908c2

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

Change-Id: I9034435da8d7019e0065098569e1b05e87c5b0a8