Update Settings to use themed Context.getDrawable()

Explicit null theme is passed when using Resources.getDrawable() and
no theme is available, e.g. when using getResourcesForApplication().
This fixes an issue with ic_text_dot theming and helps avoid similar
issues in the future.

BUG: 17648301
Change-Id: I3e97c3490b6f2a55744f567b21284f2935ae9af7
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index 04160fb..88536c4 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -211,7 +211,8 @@
                         Bundle metaData = resolveInfo.activityInfo.metaData;
 
                         if (res != null && metaData != null) {
-                            icon = res.getDrawable(metaData.getInt(META_DATA_PREFERENCE_ICON));
+                            icon = res.getDrawable(
+                                    metaData.getInt(META_DATA_PREFERENCE_ICON), null);
                             title = res.getString(metaData.getInt(META_DATA_PREFERENCE_TITLE));
                             summary = res.getString(metaData.getInt(META_DATA_PREFERENCE_SUMMARY));
                         }