Add @UnsupportedAppUsage annotations

For packages:
  android.os

This is an automatically generated CL. See go/UnsupportedAppUsage
for more details.

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

Bug: 110868826
Test: m
Change-Id: I4ece0a3f37f88fc2508cb965092aed7cabc61819
diff --git a/core/java/android/os/Handler.java b/core/java/android/os/Handler.java
index a039742..9af9eda 100644
--- a/core/java/android/os/Handler.java
+++ b/core/java/android/os/Handler.java
@@ -18,6 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.UnsupportedAppUsage;
 import android.util.Log;
 import android.util.Printer;
 
@@ -168,6 +169,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public Handler(boolean async) {
         this(null, async);
     }
@@ -229,6 +231,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public Handler(@NonNull Looper looper, @Nullable Callback callback, boolean async) {
         mLooper = looper;
         mQueue = looper.mQueue;
@@ -274,6 +277,7 @@
     }
 
     /** @hide */
+    @UnsupportedAppUsage
     @NonNull
     public static Handler getMain() {
         if (MAIN_THREAD_HANDLER == null) {
@@ -843,6 +847,7 @@
         + "}";
     }
 
+    @UnsupportedAppUsage
     final IMessenger getIMessenger() {
         synchronized (mQueue) {
             if (mMessenger != null) {
@@ -866,6 +871,7 @@
         return m;
     }
 
+    @UnsupportedAppUsage
     private static Message getPostMessage(Runnable r, Object token) {
         Message m = Message.obtain();
         m.obj = token;
@@ -877,10 +883,13 @@
         message.callback.run();
     }
 
+    @UnsupportedAppUsage
     final Looper mLooper;
     final MessageQueue mQueue;
+    @UnsupportedAppUsage
     final Callback mCallback;
     final boolean mAsynchronous;
+    @UnsupportedAppUsage
     IMessenger mMessenger;
 
     private static final class BlockingRunnable implements Runnable {