Add missing invalidation check to drawable cache

Bug: 22478448
Change-Id: Ic9da1898cd921d8c133ef5397fc97a664601a863
diff --git a/core/java/android/content/res/DrawableCache.java b/core/java/android/content/res/DrawableCache.java
index fc70bc60..ba00134 100644
--- a/core/java/android/content/res/DrawableCache.java
+++ b/core/java/android/content/res/DrawableCache.java
@@ -52,6 +52,6 @@
 
     @Override
     public boolean shouldInvalidateEntry(Drawable.ConstantState entry, int configChanges) {
-        return false;
+        return Configuration.needNewResources(configChanges, entry.getChangingConfigurations());
     }
 }