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/wifi/WifiEnabler.java

@@ -38,7 +38,7 @@ import com.android.settings.search.Index;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 public class WifiEnabler implements CompoundButton.OnCheckedChangeListener  {
-    private final Context mContext;
+    private Context mContext;
     private Switch mSwitch;
     private AtomicBoolean mConnected = new AtomicBoolean(false);
 
@@ -77,7 +77,8 @@ public class WifiEnabler implements CompoundButton.OnCheckedChangeListener  {
         mIntentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
     }
 
-    public void resume() {
+    public void resume(Context context) {
+        mContext = context;
         // Wi-Fi state is sticky, so just let the receiver update UI
         mContext.registerReceiver(mReceiver, mIntentFilter);
         mSwitch.setOnCheckedChangeListener(this);

src/com/android/settings/wifi/WifiSettings.java

@@ -416,7 +416,7 @@ public class WifiSettings extends RestrictedSettingsFragment
 
             if (activity instanceof SettingsActivity) {
                 SettingsActivity sa = (SettingsActivity) activity;
-                addSwitch = !sa.onIsHidingHeaders();
+                addSwitch = sa.onIsHidingHeaders();
             } else if (activity instanceof WifiPickerActivity) {
                 PreferenceActivity pa = (PreferenceActivity) activity;
                 addSwitch = pa.onIsHidingHeaders();
@@ -458,12 +458,13 @@ public class WifiSettings extends RestrictedSettingsFragment
 
     @Override
     public void onResume() {
+        final Activity activity = getActivity();
         super.onResume();
         if (mWifiEnabler != null) {
-            mWifiEnabler.resume();
+            mWifiEnabler.resume(activity);
         }
 
-        getActivity().registerReceiver(mReceiver, mFilter);
+        activity.registerReceiver(mReceiver, mFilter);
         updateAccessPoints();
     }
 
@@ -497,11 +498,11 @@ public class WifiSettings extends RestrictedSettingsFragment
             menu.add(Menu.NONE, MENU_ID_WPS_PBC, 0, R.string.wifi_menu_wps_pbc)
                     .setIcon(ta.getDrawable(1))
                     .setEnabled(wifiIsEnabled)
-                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
             menu.add(Menu.NONE, MENU_ID_ADD_NETWORK, 0, R.string.wifi_add_network)
                     .setIcon(ta.getDrawable(0))
                     .setEnabled(wifiIsEnabled)
-                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
             menu.add(Menu.NONE, MENU_ID_SCAN, 0, R.string.wifi_menu_scan)
                     //.setIcon(R.drawable.ic_menu_scan_network)
                     .setEnabled(wifiIsEnabled)