Make AutoFill default to on in the Browser settings.

Enable autofill by default. The user will be prompted to set up a
profile if they have not done so already when we detect an
autofillable form.

Change-Id: I10fae0fa6d805dcc4fdbc0a281bdaa971b1a89f5
diff --git a/res/xml/browser_preferences.xml b/res/xml/browser_preferences.xml
index 623c8e7..a2d91ff 100644
--- a/res/xml/browser_preferences.xml
+++ b/res/xml/browser_preferences.xml
@@ -135,7 +135,7 @@
 
         <CheckBoxPreference
                 android:key="autofill_enabled"
-                android:defaultValue="false"
+                android:defaultValue="true"
                 android:title="@string/pref_autofill_enabled"
                 android:summary="@string/pref_autofill_enabled_summary" />