Modify strict mode thread policy for LauncherProvider.

Allowing thread writes too as SQLiteOpenHelper.getWritableDatabase needs it.

Bug: 19094644
Change-Id: I39fe97a9e7fc07c38a4f8e5c5979196b742e36bf
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 4bdbdf4..bb6e8c8 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -86,7 +86,7 @@
     @Override
     public boolean onCreate() {
         final Context context = getContext();
-        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
+        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskWrites();
         mOpenHelper = new DatabaseHelper(context);
         StrictMode.setThreadPolicy(oldPolicy);
         LauncherAppState.setLauncherProvider(this);