Fix an NPE.

Apparently, it is possible that File#getPath() returns null.
In this case, we'll have a null AssetFileAddress and an NPE
later down the road.

Bug: 9944824
Change-Id: Id6ceac1cb55439660f9811cf0fe3b574200d5a20

java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java

@@ -286,7 +286,8 @@ final public class BinaryDictionaryGetter {
             }
             if (!dictPackSettings.isWordListActive(wordListId)) continue;
             if (canUse) {
-                fileList.add(AssetFileAddress.makeFromFileName(f.getPath()));
+                final AssetFileAddress afa = AssetFileAddress.makeFromFileName(f.getPath());
+                if (null != afa) fileList.add(afa);
             } else {
                 Log.e(TAG, "Found a cached dictionary file but cannot read or use it");
             }