Include ACCEPTED_URI_SCHEMA in url patterns to skip.

Without this inclusion, the web search detection code thought that URLs
of the format about:blank or about:debug were web searches and passed
them on to the search provider.
diff --git a/src/com/android/browser/BrowserActivity.java b/src/com/android/browser/BrowserActivity.java
index e738d6c..53814f2 100644
--- a/src/com/android/browser/BrowserActivity.java
+++ b/src/com/android/browser/BrowserActivity.java
@@ -914,6 +914,7 @@
         // URLs and site specific search shortcuts are handled by the regular flow of control, so
         // return early.
         if (Regex.WEB_URL_PATTERN.matcher(url).matches()
+                || ACCEPTED_URI_SCHEMA.matcher(url).matches()
                 || parseUrlShortcut(url) != SHORTCUT_INVALID) {
             return false;
         }