Revert "Update drop target button alignment across devices." am: b29dabce

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18520765



Change-Id: I03d29bb7285c56622f5f7b186289a360ce9c88f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>