Merge "Fix the problem that system apps cannot drag" am: 0d6c423c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2210995



Change-Id: Ie1313a09823c3f350a67f0199df55b30ded8d393
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>