Update LatinIME due to hidden APIs taken out of the support lib.

1. We have hidden the APIs for accessiiblity focus search since
   it wull be perfomred by the client, updated the support lib,
   and now we are updating the LatinIME.

bug:6675330

Change-Id: I9dd3450b40148be7ce750f6bffc0a047a541982f
diff --git a/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java b/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java
index ba08c59..7d5d714 100644
--- a/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java
+++ b/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java
@@ -280,12 +280,6 @@
         return createAccessibilityNodeInfo(mAccessibilityFocusedView);
     }
 
-    @Override
-    public AccessibilityNodeInfoCompat accessibilityFocusSearch(int direction, int virtualViewId) {
-        // Focus search is not currently supported for IMEs.
-        return null;
-    }
-
     /**
      * Sends an accessibility event for the given {@link Key}.
      *