Add method to get process group.

Change-Id: Ia62223228a54a6a4e3cdfc5c2e8c73ee194e77ef
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 05099fb..facab4c 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -806,7 +806,15 @@
      */
     public static final native void setProcessGroup(int pid, int group)
             throws IllegalArgumentException, SecurityException;
-    
+
+    /**
+     * Return the scheduling group of requested process.
+     *
+     * @hide
+     */
+    public static final native int getProcessGroup(int pid)
+            throws IllegalArgumentException, SecurityException;
+
     /**
      * Set the priority of the calling thread, based on Linux priorities.  See
      * {@link #setThreadPriority(int, int)} for more information.