Fixing crash when getActivity is null

> Also changing the default value of preferences to true

Change-Id: I0a80d9b6b76d7210b12c952cf8e991a3eb327e5c
diff --git a/src/com/android/launcher3/SettingsActivity.java b/src/com/android/launcher3/SettingsActivity.java
index 5d9a546..4135d5b 100644
--- a/src/com/android/launcher3/SettingsActivity.java
+++ b/src/com/android/launcher3/SettingsActivity.java
@@ -77,8 +77,8 @@
                 @Override
                 protected Boolean doInBackground(Void... params) {
                     Bundle extras = new Bundle();
-                    extras.putBoolean(LauncherSettings.Settings.EXTRA_DEFAULT_VALUE, false);
-                    Bundle value = getActivity().getContentResolver().call(
+                    extras.putBoolean(LauncherSettings.Settings.EXTRA_DEFAULT_VALUE, true);
+                    Bundle value = pref.getContext().getContentResolver().call(
                             LauncherSettings.Settings.CONTENT_URI,
                             LauncherSettings.Settings.METHOD_GET_BOOLEAN,
                             pref.getKey(), extras);