Fix issue #6921726: Prime: Cannot make or receive phone calls...

[NPE at android.graphics.drawable.Drawable.createFromResourceStream]

Change-Id: I223428ffb39e883518aad817227f32851ea18aec

Author: Dianne Hackborn

graphics/java/android/graphics/drawable/Drawable.java

@@ -778,7 +778,8 @@ public static Drawable createFromResourceStream(Resources res, TypedValue value,
         // to the compatibility density only to have them scaled back up when
         // drawn to the screen.
         if (opts == null) opts = new BitmapFactory.Options();
-        opts.inScreenDensity = res.getDisplayMetrics().noncompatDensityDpi;
+        opts.inScreenDensity = res != null
+                ? res.getDisplayMetrics().noncompatDensityDpi : DisplayMetrics.DENSITY_DEVICE;
         Bitmap  bm = BitmapFactory.decodeResourceStream(res, value, is, pad, opts);
         if (bm != null) {
             byte[] np = bm.getNinePatchChunk();