Fix trackball selection on the desktop (not all apps, yet)
AllApps view is always visible (in the View sense), which was causing it
to take focus when it should not have. Changed Launcher to manually
turn on/off the focusability of AllApps as it appears/disappears.
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index bddc9ac..8516366 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -529,6 +529,8 @@
         mAllAppsGrid.setLauncher(this);
         mAllAppsGrid.setDragController(dragController);
         mAllAppsGrid.setWillNotDraw(false); // We don't want a hole punched in our window.
+        // Manage focusability manually since this thing is always visible
+        mAllAppsGrid.setFocusable(false); 
 
         mWorkspace = (Workspace) dragLayer.findViewById(R.id.workspace);
         final Workspace workspace = mWorkspace;
@@ -1611,6 +1613,8 @@
         mAllAppsGrid.zoom(1.0f);
         //mWorkspace.hide();
 
+        mAllAppsGrid.setFocusable(true);
+        
         // TODO: fade these two too
         mDeleteZone.setVisibility(View.GONE);
         //mHandleView.setVisibility(View.GONE);
@@ -1619,8 +1623,10 @@
     void closeAllApps(boolean animated) {
         if (mAllAppsGrid.isVisible()) {
             mAllAppsGrid.zoom(0.0f);
+            mAllAppsGrid.setFocusable(false);
             mWorkspace.getChildAt(mWorkspace.getCurrentScreen()).requestFocus();
 
+
             // TODO: fade these two too
             /*
             mDeleteZone.setVisibility(View.VISIBLE);