When the launcher is paused and we reload stuff in the background, we need to re-re-load it in onResume.

Otherwise we can load widgets and other resources from the wrong Configuration.
This doesn't completely fix the bug, but it makes it much less likely.  We tell
the launcher once at the beginning of starting a reload because of SD cards coming
back, and once when we bind.

cherry pick of I99ee6af38bef91e261832bad4dec978a5d4a8b3d

Bug: 3126698
Change-Id: I917bdb3982e3eea4924c6e9a8f3c037fd493f415

src/com/android/launcher2/LauncherModel.java

@@ -108,6 +108,7 @@ public class LauncherModel extends BroadcastReceiver {
     private static int mCellCountY;
 
     public interface Callbacks {
+        public boolean setLoadOnResume();
         public int getCurrentWorkspaceScreen();
         public void startBinding();
         public void bindItems(ArrayList<ItemInfo> shortcuts, int start, int end);
@@ -433,7 +434,19 @@ public class LauncherModel extends BroadcastReceiver {
             String[] packages = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST);
             enqueuePackageUpdated(new PackageUpdatedTask(PackageUpdatedTask.OP_ADD, packages));
             // Then, rebind everything.
-            startLoader(mApp, false);
+            boolean runLoader = true;
+            if (mCallbacks != null) {
+                Callbacks callbacks = mCallbacks.get();
+                if (callbacks != null) {
+                    // If they're paused, we can skip loading, because they'll do it again anyway
+                    if (callbacks.setLoadOnResume()) {
+                        runLoader = false;
+                    }
+                }
+            }
+            if (runLoader) {
+                startLoader(mApp, false);
+            }
 
         } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE.equals(action)) {
             String[] packages = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST);