Use overlay action mode

 Bug: 5327408
 By using actionBar: false with actionModeOverlay: true the
 action mode callbacks happen before the action mode animation.
 This allows us to animate down the URL bar at the same time if
 needed (when the URL is being edited).

 Overlay mode fixes the issue with webview being translated, which
 was what caused the selection handles to move. Only the selection
 handles were affected thanks to b/4982054

Change-Id: I8153de63124eb4e4d02e88637f0cf01658054a14
3 files changed