Merge "Remove Webview Overlays on destroy" into sc-dev am: e44bc77b am: dc7594b5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15546814

Change-Id: I7538b9f56f6f8e759b4894f62eca0f4c7e9ba4b1