Add support for SmartClip interface in the glue layer.

Bug: 18222974
Change-Id: Ie39d49e9dfe90f20b6eb5d28009313781eac8e01
Merge tag 'android-5.0.0_r7' of https://android.googlesource.com/platform/frameworks/webview into HEAD

Android 5.0.0 release 7