Merge "Pass last touch event to DragDownHelper when starting doze" into udc-dev am: 4422c68b am: c142d4d1 am: bcc2e10d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23267936



Change-Id: I58ec8a059d9155cecdd5212ceb5d5f0fd5dd6f56
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>