Use Drawer in Settings app

- get rid of PreferenceActivity as much as we can and use fragments instead
- add Drawer widget
- add Dashboard high level entry into the Drawer (but this is work in progress and would be done in another CL)
- add bypass of fragment's Header  validation when launched from the Drawer but *force* validation if external
call thru an Intent

Be aware that WifiPickerActivity should remain for now a PreferenceActivity. It is used by SetupWizard and should
not trigger running the SettingsActivity's header building code. SetupWizard is a Home during the provisionnig process
and then deactivate itself as a Home but would make the Home header to appear in the Drawer (because momentarily we
would have two Home).

Also, verified that:

- the WiFi settings still work when called from SetupWizard
- when you have multiple Launchers, the Home header will appear in the list of Headers in the Drawer

Change-Id: I407a5e0fdd843ad7615d3d511c416a44e3d97c90

src/com/android/settings/ChooseLockPattern.java

@@ -22,7 +22,6 @@ import com.android.internal.widget.LinearLayoutWithDefaultTouchRecepient;
 import com.android.internal.widget.LockPatternUtils;
 import com.android.internal.widget.LockPatternView;
 import com.android.internal.widget.LockPatternView.Cell;
-import com.android.settings.ChooseLockGeneric.ChooseLockGenericFragment;
 
 import static com.android.internal.widget.LockPatternView.DisplayMode;
 
@@ -30,7 +29,6 @@ import android.app.Activity;
 import android.app.Fragment;
 import android.content.Intent;
 import android.os.Bundle;
-import android.preference.PreferenceActivity;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -49,7 +47,7 @@ import java.util.List;
  * - asks for confirmation / restart
  * - saves chosen password when confirmed
  */
-public class ChooseLockPattern extends PreferenceActivity {
+public class ChooseLockPattern extends SettingsActivity {
     /**
      * Used by the choose lock pattern wizard to indicate the wizard is
      * finished, and each activity in the wizard should finish.
@@ -80,7 +78,7 @@ public class ChooseLockPattern extends PreferenceActivity {
         // requestWindowFeature(Window.FEATURE_NO_TITLE);
         super.onCreate(savedInstanceState);
         CharSequence msg = getText(R.string.lockpassword_choose_your_pattern_header);
-        showBreadCrumbs(msg, msg);
+        setTitle(msg);
     }
 
     @Override