Remove hidden LocaleList default constructor

Previous change hid this constructor. Now removing it entirely for completeness.

Issue #28296200  API Review: LocaleList

Change-Id: I43476994070b101999d338ec1f5d1a1a0a2a7658

core/java/android/os/LocaleList.java

@@ -147,17 +147,6 @@ public final class LocaleList implements Parcelable {
         return mStringRepresentation;
     }
 
-    /**
-     * It is almost always better to call {@link #getEmptyLocaleList()} instead which returns
-     * a pre-constructed empty locale list.
-     *
-     * @hide
-     */
-    public LocaleList() {
-        mList = sEmptyList;
-        mStringRepresentation = "";
-    }
-
     /**
      * Creates a new {@link LocaleList}.
      *