Merge "Fix accident evict if drag same app to same position." into udc-dev am:...

Merge "Fix accident evict if drag same app to same position." into udc-dev am: cf02b08d am: a8de14cc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22954939



Change-Id: I6f96ced72d4d14bb4987b9387d9294bff2659139
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>