Replace native Process getpid/getuid with calls to libcore equivalents.

The Process natives were getting called were getting called while
handling a jdwp packet before the vm had a chance to register them.

(cherry-pick of 5bce6a308fc8a3c1e449cf905b8b6e8ace4ef3e2.)

Change-Id: Ia2b4f79b11e427283a712b2d0c52948f394640bf
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 476b4ea..0e38ebc 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -27,6 +27,8 @@
 import java.io.OutputStreamWriter;
 import java.util.ArrayList;
 
+import libcore.io.Libcore;
+
 /*package*/ class ZygoteStartFailedEx extends Exception {
     /**
      * Something prevented the zygote process startup from happening normally
@@ -647,7 +649,9 @@
      * Returns the identifier of this process, which can be used with
      * {@link #killProcess} and {@link #sendSignal}.
      */
-    public static final native int myPid();
+    public static final int myPid() {
+        return Libcore.os.getpid();
+    }
 
     /**
      * Returns the identifier of the calling thread, which be used with
@@ -661,7 +665,9 @@
      * app-specific sandbox.  It is different from {@link #myUserHandle} in that
      * a uid identifies a specific app sandbox in a specific user.
      */
-    public static final native int myUid();
+    public static final int myUid() {
+        return Libcore.os.getuid();
+    }
 
     /**
      * Returns this process's user handle.  This is the