Fix bug #5175022 Easy mode in MeasuredText.setPara() is no more used

- use the real TextDirectionHeuristics constants
- make more formal that LayoutDirection should be resolved BEFORE TextDirection
- reset TextDirection if LayoutDirection is recomputed
- remove non used TextDirectionHeuristic.isRtl(CharSequence...)

Change-Id: I1d53a7e3ee324cfd27785bb4d715d93de8d9ff4d
diff --git a/core/java/android/text/TextDirectionHeuristic.java b/core/java/android/text/TextDirectionHeuristic.java
index 130f879..0bf64e4 100644
--- a/core/java/android/text/TextDirectionHeuristic.java
+++ b/core/java/android/text/TextDirectionHeuristic.java
@@ -1,4 +1,18 @@
-// Copyright 2011 Google Inc. All Rights Reserved.
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 package android.text;
 
@@ -8,6 +22,5 @@
  * @hide
  */
 public interface TextDirectionHeuristic {
-    /** @hide */ boolean isRtl(CharSequence text, int start, int end);
     /** @hide */ boolean isRtl(char[] text, int start, int count);
 }