[automerger skipped] Adjust where the back button is rendered for new SUW requirements. am: afc6cfcd3b -s ours

am skip reason: Merged-In I22680f40c0ddf7cd03ab1da69406eb14184b0174 with SHA-1 da26e19dd8 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/26784344

Change-Id: I448fd41512d6e9d52a485b50c6e2d36b3095edf9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>