Reload page on settings change

- Reload current webpage when user tweaks browser settings

CR-Fixed: 5570

Change-Id: I643b857b23e2f39e6f54c3d38eb83622e0794d96
diff --git a/src/com/android/browser/PreferenceKeys.java b/src/com/android/browser/PreferenceKeys.java
index 2f144c5..15ec6a0 100644
--- a/src/com/android/browser/PreferenceKeys.java
+++ b/src/com/android/browser/PreferenceKeys.java
@@ -143,4 +143,6 @@
     static final String PREF_LEGAL_CREDITS = "legal_credits";
     static final String PREF_LEGAL_EULA = "legal_eula";
     static final String PREF_LEGAL_PRIVACY_POLICY = "legal_privacy_policy";
+
+    static final String ACTION_RELOAD_PAGE = "reload";
 }