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: I2d5652027ffe2c5c930cfb161e20fccc19891564