Configure AutoFill through browser preferences.

Defaults to off until we have a profile editor. Until the profile
editor is finished, we use a canned "John Smith" profile.

Requires a corresponding change in frameworks/base -
https://android-git.corp.google.com/g/65573

Change-Id: Ieb0c49b79766ba670322b8bd8b84968e778920ae
diff --git a/res/xml/browser_preferences.xml b/res/xml/browser_preferences.xml
index 1da85ec..cc9b18a 100644
--- a/res/xml/browser_preferences.xml
+++ b/res/xml/browser_preferences.xml
@@ -139,6 +139,12 @@
                 android:title="@string/pref_security_save_form_data"
                 android:summary="@string/pref_security_save_form_data_summary" />
 
+        <CheckBoxPreference
+                android:key="autoFill_enabled"
+                android:defaultValue="false"
+                android:title="@string/pref_autoFill_enabled"
+                android:summary="@string/pref_autoFill_enabled_summary" />
+
         <com.android.browser.BrowserYesNoPreference
                 android:key="privacy_clear_form_data"
                 android:title="@string/pref_privacy_clear_form_data"