Merge "Delaying initializing "is launcher3" flag" into sc-dev am: 3941bc65e3 am: fdcc06cd4a am: e8ec599bca

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

Change-Id: I4d0af0abd04d2aff128345d1fdf047e3783a5e9d