Use LinkTextView for support disclaimer text.

LinkTextView uses LinkAccessibilityHelper to properly handle
making links accessible.

Deleted Settings' outdated fork for the version in setupwizardlib.

Test: manual

Change-Id: I38c031f96b5be0d45e4cc1aa358f95b229f17480
Fixes: 31077012

src/com/android/settings/widget/LinkTextView.java

@@ -18,12 +18,14 @@ package com.android.settings.widget;
 
 import android.content.Context;
 import android.support.annotation.NonNull;
+import android.support.v13.view.ViewCompat;
 import android.text.Spanned;
 import android.text.method.LinkMovementMethod;
 import android.text.style.ClickableSpan;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.widget.TextView;
+import com.android.setupwizardlib.util.LinkAccessibilityHelper;
 
 /**
  * Copied from setup wizard.
@@ -39,7 +41,7 @@ public class LinkTextView extends TextView {
     public LinkTextView(Context context, AttributeSet attrs) {
         super(context, attrs);
         mAccessibilityHelper = new LinkAccessibilityHelper(this);
-        setAccessibilityDelegate(mAccessibilityHelper);
+        ViewCompat.setAccessibilityDelegate(this, mAccessibilityHelper);
     }
 
     @Override