Cherry pick [Android] Hide handles when the containing view moves

Cherry pick of https://codereview.chromium.org/26575006/

Bug: 10892868

Original description:
[Android] Hide handles when the containing view moves

We temporarily hide handles when there is a scroll or zoom in the
content area. When the containing view is moved, we should also hide
the handles. This is particularly important for webview where scrolling
is often handled outside of the webview itself (and is sometimes mixed
between the two).

BUG=b/10892868

Change-Id: I79e5238f3c61d7fee725f4eab8fe29363409b80d
1 file changed