Fix FOCUS_BACKWARD search if view had no id

 Bug: 6126875

Change-Id: I113a7125d71dc3e6cc34d31a669e844a4a882266
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index ecfca74..c982d7a 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -5247,6 +5247,7 @@
                 if (mNextFocusForwardId == View.NO_ID) return null;
                 return findViewInsideOutShouldExist(root, mNextFocusForwardId);
             case FOCUS_BACKWARD: {
+                if (mID == View.NO_ID) return null;
                 final int id = mID;
                 return root.findViewByPredicateInsideOut(this, new Predicate<View>() {
                     @Override