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/applications/InstalledAppDetailsTop.java

@@ -1,12 +1,25 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package com.android.settings.applications;
 
-import android.app.Fragment;
 import android.content.Intent;
-import android.preference.PreferenceActivity;
+import com.android.settings.SettingsActivity;
 
-import com.android.settings.ChooseLockGeneric.ChooseLockGenericFragment;
-
-public class InstalledAppDetailsTop extends PreferenceActivity {
+public class InstalledAppDetailsTop extends SettingsActivity {
 
     @Override
     public Intent getIntent() {
@@ -21,5 +34,4 @@ public class InstalledAppDetailsTop extends PreferenceActivity {
         if (InstalledAppDetails.class.getName().equals(fragmentName)) return true;
         return false;
     }
-
 }