Merge "Remove vestiges of old notification swipe logic from dream overlay."...

Merge "Remove vestiges of old notification swipe logic from dream overlay." into tm-dev am: e5bdb0f9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17110359

Change-Id: I8a07ace7b7c4253dd8d336cc436342e20b4a97d6