Annotate two non-SDK methods known to be used by apps

Exempted-From-Owner-Approval: Mechanical changes to the codebase
which have been approved by Android API council and announced on
android-eng@

Bug: 121237128
Bug: 120783643
Test: m appcompat
Change-Id: Ib7a8bdf3151290aa8a5ca85dc8650612432f0d59

core/java/android/webkit/WebSyncManager.java

@@ -26,6 +26,7 @@ import android.content.Context;
 abstract class WebSyncManager implements Runnable {
     protected static final java.lang.String LOGTAG = "websync";
     protected android.webkit.WebViewDatabase mDataBase;
+    @UnsupportedAppUsage
     protected android.os.Handler mHandler;
 
     protected WebSyncManager(Context context, String name) {

core/java/com/android/internal/widget/NumericTextView.java

@@ -16,6 +16,7 @@
 
 package com.android.internal.widget;
 
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
@@ -53,6 +54,7 @@ public class NumericTextView extends TextView {
 
     private OnValueChangedListener mListener;
 
+    @UnsupportedAppUsage
     public NumericTextView(Context context, AttributeSet attrs) {
         super(context, attrs);