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

src/com/android/settings/RegulatoryInfoDisplayActivity.java

@@ -63,7 +63,7 @@ public class RegulatoryInfoDisplayActivity extends Activity implements
         int resId = getResourceId();
         if (resId != 0) {
             try {
-                Drawable d = resources.getDrawable(resId);
+                Drawable d = getDrawable(resId);
                 // set to false if the width or height is <= 2
                 // (missing PNG can return an empty 2x2 pixel Drawable)
                 regulatoryInfoDrawableExists = (d.getIntrinsicWidth() > 2