Merge "Add SwipeHelper dump to better understand the error state." into udc-dev am: fb1709fd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23449469



Change-Id: I38e330c52b3a89e2b0753706b3f5bc2161e826b4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>