Keep LMP from breaking KitKat API

- Bug: 17390371

Change-Id: I25c1abebcc42ed24abd57bbe2834a40fb8ee834b

api/current.txt

@@ -14015,7 +14015,7 @@ package android.location {
     ctor public SettingInjectorService(java.lang.String);
     method public final android.os.IBinder onBind(android.content.Intent);
     method protected abstract boolean onGetEnabled();
-    method protected deprecated java.lang.String onGetSummary();
+    method protected abstract deprecated java.lang.String onGetSummary();
     method public final void onStart(android.content.Intent, int);
     method public final int onStartCommand(android.content.Intent, int, int);
     field public static final java.lang.String ACTION_INJECTED_SETTING_CHANGED = "android.location.InjectedSettingChanged";

location/java/android/location/SettingInjectorService.java

@@ -196,10 +196,7 @@ public abstract class SettingInjectorService extends Service {
      * @deprecated not called any more
      */
     @Deprecated
-    protected String onGetSummary() {
-        // Do not delete until no callers have @Override annotations for this method
-        return null;
-    }
+    protected abstract String onGetSummary();
 
     /**
      * Returns the {@link android.preference.Preference#isEnabled()} value. Should not perform