Merge "webkit: Add note about HttpAuthHandler being called from Ui" into udc-dev am: 0454dcac

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22094726



Change-Id: Ibfb5954cb84daa9b3dde527695c8be5b2234f46a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>