Bug fixes, UI flow improvements.

Bug: 3173067 - Auto timezone checkbox out of sync with dependency
Bug: 3175116 - Crash when launching Manage Accounts screen
Move "Add Account" to a menu item from a button at the bottom.

src/com/android/settings/Settings.java

@@ -192,4 +192,5 @@ public class Settings extends PreferenceActivity {
     public static class DockSettingsActivity extends Settings { }
     public static class RunningServicesActivity extends Settings { }
     public static class VoiceInputOutputSettingsActivity extends Settings { }
+    public static class ManageAccountsSettingsActivity extends Settings { }
 }