Settings - update for new UI (no more Drawer)

- follow the UX spec by no more using a Drawer
- the Dashboard is now a Fragment that contains the list of Headers
- the search results are also put into a Fragment that is replacing
the initial one (Dashboard or other) when expanding the SearchView
- use a SearchView for query input
- when tapping on a Header or a Search Result, re-launch Settings as
an Activity so that we are benefiting from the Activity stack for
UP affordance and BACK button
- manage UP affordance to show it only when needed
- move some Actions to the Menu in the ActionBar for allowing space
to the Search action and removing some clutter
- fix an issue with the Index and WiFiEnabler and their cached Context
that was not updated when there was a Configuration change
- simplify the SettingsActivity code by extracting some inner classes

Change-Id: I50b5f77bb44a7fade1886114dbbc820609a5e63d

src/com/android/settings/search/Index.java

@@ -96,7 +96,7 @@ public class Index {
     private static Index sInstance;
     private final AtomicBoolean mIsAvailable = new AtomicBoolean(false);
     private final UpdateData mDataToProcess = new UpdateData();
-    private final Context mContext;
+    private Context mContext;
 
     /**
      * A private class to describe the update data for the Index database
@@ -124,6 +124,8 @@ public class Index {
     public static Index getInstance(Context context) {
         if (sInstance == null) {
             sInstance = new Index(context);
+        } else {
+            sInstance.setContext(context);
         }
         return sInstance;
     }
@@ -132,6 +134,10 @@ public class Index {
         mContext = context;
     }
 
+    public void setContext(Context context) {
+        mContext = context;
+    }
+
     public boolean isAvailable() {
         return mIsAvailable.get();
     }
@@ -675,6 +681,17 @@ public class Index {
         return (data != null) ? data.toString() : null;
     }
 
+    private int getResId(Context context, AttributeSet set, int[] attrs, int resId) {
+        final TypedArray sa = context.obtainStyledAttributes(set, attrs);
+        final TypedValue tv = sa.peekValue(resId);
+
+        if (tv != null && tv.type == TypedValue.TYPE_STRING) {
+            return tv.resourceId;
+        } else {
+            return 0;
+        }
+   }
+
     /**
      * A private class for updating the Index database
      */