Fix SQLite crashes in Launcher

We were using multiple SQLiteOpenHelpers, which
causes problems; this change switches us to using
only one

Bug: 8346109

Change-Id: If7d4dff3d34edb38d9586d3b0f4e8e1747a71a75
diff --git a/src/com/android/launcher2/LauncherModel.java b/src/com/android/launcher2/LauncherModel.java
index 9a5bd47..99808a6 100644
--- a/src/com/android/launcher2/LauncherModel.java
+++ b/src/com/android/launcher2/LauncherModel.java
@@ -1988,7 +1988,10 @@
                     for (int i=0; i<N; i++) {
                         if (DEBUG_LOADERS) Log.d(TAG, "mAllAppsList.updatePackage " + packages[i]);
                         mBgAllAppsList.updatePackage(context, packages[i]);
-                        WidgetPreviewLoader.removeFromDb(context, packages[i]);
+                        LauncherApplication app =
+                                (LauncherApplication) context.getApplicationContext();
+                        WidgetPreviewLoader.removeFromDb(
+                                app.getWidgetPreviewCacheDb(), packages[i]);
                     }
                     break;
                 case OP_REMOVE:
@@ -1996,7 +1999,10 @@
                     for (int i=0; i<N; i++) {
                         if (DEBUG_LOADERS) Log.d(TAG, "mAllAppsList.removePackage " + packages[i]);
                         mBgAllAppsList.removePackage(packages[i]);
-                        WidgetPreviewLoader.removeFromDb(context, packages[i]);
+                        LauncherApplication app =
+                                (LauncherApplication) context.getApplicationContext();
+                        WidgetPreviewLoader.removeFromDb(
+                                app.getWidgetPreviewCacheDb(), packages[i]);
                     }
                     break;
             }