Merge "Merge "Use new onStartSplitLegacy when starting split from overview"...

Merge "Merge "Use new onStartSplitLegacy when starting split from overview" into tm-dev am: 8aead550 am: b57e29f7" into tm-d1-dev-plus-aosp am: 4ea7e542

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17779173



Change-Id: Ifedff0cecce0795893b44a979be3853d37630ee7
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>