Fixing various small bugs with launcher

- Items added from customization tray add from top left now
- Fixing issue where wallpaper tab was not showing
- Workaround for the extra pixel line showing in homescreen drag icons
- Speeding up animations for tab transitions and clicking

Change-Id: I865531bb4cf896320a9e2ff6cef08bed221a2294
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index 81e1847..37c2b41 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -316,7 +316,8 @@
             mHomeCustomizationDrawer.setOnTabChangedListener(new OnTabChangeListener() {
                 public void onTabChanged(String tabId) {
                     // animate the changing of the tab content by fading pages in and out
-                    final int duration = 150;
+                    final Resources res = getResources();
+                    final int duration = res.getInteger(R.integer.config_tabTransitionTime);
                     final float alpha = mCustomizePagedView.getAlpha();
                     ValueAnimator alphaAnim = ObjectAnimator.ofFloat(mCustomizePagedView,
                             "alpha", alpha, 0.0f);