Fix legal info back button

Make it its own SettingsPreferenceFragment.

whitespace--

Bug: 20727881
Change-Id: I1f790af03d316c1d43377a6d8606084d9f3a747f

src/com/android/settings/InstrumentedFragment.java

@@ -26,6 +26,8 @@ public abstract class InstrumentedFragment extends PreferenceFragment {
     // Declare new temporary categories here, starting after this value.
     public static final int UNDECLARED = 100000;
 
+    public static final int ABOUT_LEGAL_SETTINGS = UNDECLARED + 1;
+
     /**
      * Declare the view of this category.
      *