Use Map.Entry, not LinkedHashMap.Entry

Map.Entry is the defined return value from entrySet().
LinkedHashMap.Entry shouldn't be used directly.

Change-Id: Ib23ceac365c85cdec6ab1688e8f8168ce882bc90

samples/XmlAdapters/src/com/example/android/xmladapters/ImageDownloader.java

@@ -41,6 +41,7 @@ import java.lang.ref.SoftReference;
 import java.lang.ref.WeakReference;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
+import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
@@ -62,7 +63,7 @@ public class ImageDownloader {
         new LinkedHashMap<String, Bitmap>(HARD_CACHE_CAPACITY / 2, 0.75f, true) {
         private static final long serialVersionUID = -7190622541619388252L;
         @Override
-        protected boolean removeEldestEntry(LinkedHashMap.Entry<String, Bitmap> eldest) {
+        protected boolean removeEldestEntry(Map.Entry<String, Bitmap> eldest) {
             if (size() > HARD_CACHE_CAPACITY) {
                 // Entries push-out of hard reference cache are transferred to soft reference cache
                 sSoftBitmapCache.put(eldest.getKey(), new SoftReference<Bitmap>(eldest.getValue()));