WebViewDatabase v11 for ICS.

Bump WebView database version to 11. This has the following effects:

- Removes the old webview cookie table on GB devices. Cookies are now
  managed by the Chromium stack.
- Removes the old webview cache database on GB devices. Cache is now
  managed by the Chromium stack.
- Autocomplete form data is now stored/retrieved based on
  the URL minus the query string/fragment. Upgrade any existing
  form URLs in the database to match this format, so we can
  still use them. This will impact GB and HC devices.

  This has an unfortunate side effect that we may end up with
  duplicate URLs in the formurl table (say we had two URLS for the
  same host but with different query strings). Currently we only take
  the first url from the table - which is fine when they were
  unique. The simplest way to work around this is just iterate all the
  rows returned and use all the values we find.

Bug: 5560410
Change-Id: I59323dc5e523969e0a1c268b5936d6fa998d625c