Properly releasing ContentProviderClient after LauncherModel check.

Change-Id: I0823ada46661b5ba0c36a0bb9f792969a1d04561
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index 007fd7a..5f8f80c 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -191,8 +191,12 @@
         ContentResolver contentResolver = context.getContentResolver();
 
         mAppsCanBeOnRemoveableStorage = Environment.isExternalStorageRemovable();
-        mOldContentProviderExists = (contentResolver.acquireContentProviderClient(
-                LauncherSettings.Favorites.OLD_CONTENT_URI) != null);
+        ContentProviderClient client = contentResolver.acquireContentProviderClient(
+                LauncherSettings.Favorites.OLD_CONTENT_URI);
+        mOldContentProviderExists = (client != null);
+        if (client != null) {
+            client.release();
+        }
         mApp = app;
         mBgAllAppsList = new AllAppsList(iconCache, appFilter);
         mIconCache = iconCache;