Track deprecation/replacement of Os methods that depend on Mutable*

Another CL in this CL topic is deprecating/removing three methods
in android.system.Os, and introducing replacements.

This CL tracks that change by updating frameworks/base accordingly.

Test: Treehugger
Bug: 67901714

Change-Id: I96ad205a305801b2cb641ba8984810dfe6474032
diff --git a/api/current.txt b/api/current.txt
index d43dcb8..3765092 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -38005,6 +38005,16 @@
     field public final int errno;
   }
 
+  public class Int32Ref {
+    ctor public Int32Ref(int);
+    field public int value;
+  }
+
+  public class Int64Ref {
+    ctor public Int64Ref(long);
+    field public long value;
+  }
+
   public final class Os {
     method public static java.io.FileDescriptor accept(java.io.FileDescriptor, java.net.InetSocketAddress) throws android.system.ErrnoException, java.net.SocketException;
     method public static boolean access(java.lang.String, int) throws android.system.ErrnoException;
@@ -38074,7 +38084,8 @@
     method public static void remove(java.lang.String) throws android.system.ErrnoException;
     method public static void removexattr(java.lang.String, java.lang.String) throws android.system.ErrnoException;
     method public static void rename(java.lang.String, java.lang.String) throws android.system.ErrnoException;
-    method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.util.MutableLong, long) throws android.system.ErrnoException;
+    method public static deprecated long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.util.MutableLong, long) throws android.system.ErrnoException;
+    method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.system.Int64Ref, long) throws android.system.ErrnoException;
     method public static int sendto(java.io.FileDescriptor, java.nio.ByteBuffer, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static int sendto(java.io.FileDescriptor, byte[], int, int, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static void setegid(int) throws android.system.ErrnoException;
@@ -38099,7 +38110,8 @@
     method public static int umask(int);
     method public static android.system.StructUtsname uname();
     method public static void unsetenv(java.lang.String) throws android.system.ErrnoException;
-    method public static int waitpid(int, android.util.MutableInt, int) throws android.system.ErrnoException;
+    method public static deprecated int waitpid(int, android.util.MutableInt, int) throws android.system.ErrnoException;
+    method public static int waitpid(int, android.system.Int32Ref, int) throws android.system.ErrnoException;
     method public static int write(java.io.FileDescriptor, java.nio.ByteBuffer) throws android.system.ErrnoException, java.io.InterruptedIOException;
     method public static int write(java.io.FileDescriptor, byte[], int, int) throws android.system.ErrnoException, java.io.InterruptedIOException;
     method public static int writev(java.io.FileDescriptor, java.lang.Object[], int[], int[]) throws android.system.ErrnoException, java.io.InterruptedIOException;
diff --git a/api/system-current.txt b/api/system-current.txt
index 8f19a68..9b9df3c 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -41219,6 +41219,16 @@
     field public final int errno;
   }
 
+  public class Int32Ref {
+    ctor public Int32Ref(int);
+    field public int value;
+  }
+
+  public class Int64Ref {
+    ctor public Int64Ref(long);
+    field public long value;
+  }
+
   public final class Os {
     method public static java.io.FileDescriptor accept(java.io.FileDescriptor, java.net.InetSocketAddress) throws android.system.ErrnoException, java.net.SocketException;
     method public static boolean access(java.lang.String, int) throws android.system.ErrnoException;
@@ -41288,7 +41298,8 @@
     method public static void remove(java.lang.String) throws android.system.ErrnoException;
     method public static void removexattr(java.lang.String, java.lang.String) throws android.system.ErrnoException;
     method public static void rename(java.lang.String, java.lang.String) throws android.system.ErrnoException;
-    method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.util.MutableLong, long) throws android.system.ErrnoException;
+    method public static deprecated long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.util.MutableLong, long) throws android.system.ErrnoException;
+    method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.system.Int64Ref, long) throws android.system.ErrnoException;
     method public static int sendto(java.io.FileDescriptor, java.nio.ByteBuffer, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static int sendto(java.io.FileDescriptor, byte[], int, int, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static void setegid(int) throws android.system.ErrnoException;
@@ -41313,7 +41324,8 @@
     method public static int umask(int);
     method public static android.system.StructUtsname uname();
     method public static void unsetenv(java.lang.String) throws android.system.ErrnoException;
-    method public static int waitpid(int, android.util.MutableInt, int) throws android.system.ErrnoException;
+    method public static deprecated int waitpid(int, android.util.MutableInt, int) throws android.system.ErrnoException;
+    method public static int waitpid(int, android.system.Int32Ref, int) throws android.system.ErrnoException;
     method public static int write(java.io.FileDescriptor, java.nio.ByteBuffer) throws android.system.ErrnoException, java.io.InterruptedIOException;
     method public static int write(java.io.FileDescriptor, byte[], int, int) throws android.system.ErrnoException, java.io.InterruptedIOException;
     method public static int writev(java.io.FileDescriptor, java.lang.Object[], int[], int[]) throws android.system.ErrnoException, java.io.InterruptedIOException;
diff --git a/api/test-current.txt b/api/test-current.txt
index 9280e04..07b860f 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -38212,6 +38212,16 @@
     field public final int errno;
   }
 
+  public class Int32Ref {
+    ctor public Int32Ref(int);
+    field public int value;
+  }
+
+  public class Int64Ref {
+    ctor public Int64Ref(long);
+    field public long value;
+  }
+
   public final class Os {
     method public static java.io.FileDescriptor accept(java.io.FileDescriptor, java.net.InetSocketAddress) throws android.system.ErrnoException, java.net.SocketException;
     method public static boolean access(java.lang.String, int) throws android.system.ErrnoException;
@@ -38281,7 +38291,8 @@
     method public static void remove(java.lang.String) throws android.system.ErrnoException;
     method public static void removexattr(java.lang.String, java.lang.String) throws android.system.ErrnoException;
     method public static void rename(java.lang.String, java.lang.String) throws android.system.ErrnoException;
-    method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.util.MutableLong, long) throws android.system.ErrnoException;
+    method public static deprecated long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.util.MutableLong, long) throws android.system.ErrnoException;
+    method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.system.Int64Ref, long) throws android.system.ErrnoException;
     method public static int sendto(java.io.FileDescriptor, java.nio.ByteBuffer, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static int sendto(java.io.FileDescriptor, byte[], int, int, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static void setegid(int) throws android.system.ErrnoException;
@@ -38306,7 +38317,8 @@
     method public static int umask(int);
     method public static android.system.StructUtsname uname();
     method public static void unsetenv(java.lang.String) throws android.system.ErrnoException;
-    method public static int waitpid(int, android.util.MutableInt, int) throws android.system.ErrnoException;
+    method public static deprecated int waitpid(int, android.util.MutableInt, int) throws android.system.ErrnoException;
+    method public static int waitpid(int, android.system.Int32Ref, int) throws android.system.ErrnoException;
     method public static int write(java.io.FileDescriptor, java.nio.ByteBuffer) throws android.system.ErrnoException, java.io.InterruptedIOException;
     method public static int write(java.io.FileDescriptor, byte[], int, int) throws android.system.ErrnoException, java.io.InterruptedIOException;
     method public static int writev(java.io.FileDescriptor, java.lang.Object[], int[], int[]) throws android.system.ErrnoException, java.io.InterruptedIOException;
diff --git a/core/java/android/net/LocalSocketImpl.java b/core/java/android/net/LocalSocketImpl.java
index 05c8afb..6e4a231 100644
--- a/core/java/android/net/LocalSocketImpl.java
+++ b/core/java/android/net/LocalSocketImpl.java
@@ -16,18 +16,18 @@
 
 package android.net;
 
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.InputStream;
-import java.io.FileDescriptor;
-import java.net.SocketOptions;
-
 import android.system.ErrnoException;
+import android.system.Int32Ref;
 import android.system.Os;
 import android.system.OsConstants;
 import android.system.StructLinger;
 import android.system.StructTimeval;
-import android.util.MutableInt;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.SocketOptions;
 
 /**
  * Socket implementation used for android.net.LocalSocket and
@@ -62,7 +62,7 @@
             FileDescriptor myFd = fd;
             if (myFd == null) throw new IOException("socket closed");
 
-            MutableInt avail = new MutableInt(0);
+            Int32Ref avail = new Int32Ref(0);
             try {
                 Os.ioctlInt(myFd, OsConstants.FIONREAD, avail);
             } catch (ErrnoException e) {
@@ -167,7 +167,7 @@
             if (myFd == null) throw new IOException("socket closed");
 
             // Loop until the output buffer is empty.
-            MutableInt pending = new MutableInt(0);
+            Int32Ref pending = new Int32Ref(0);
             while (true) {
                 try {
                     // See linux/net/unix/af_unix.c