Add ShadowsocksDeathRecipient

src/main/scala/com/github/shadowsocks/ShadowsocksDeathRecipient.scala

@@ -0,0 +1,28 @@
+package com.github.shadowsocks
+
+import android.os.IBinder
+import android.util.Log
+import com.github.shadowsocks.utils.ProcessUtils._
+
+/**
+  * @author chentaov5@gmail.com
+  */
+class ShadowsocksDeathRecipient(val mContext: ServiceBoundContext)
+  extends IBinder.DeathRecipient {
+
+  val TAG = "ShadowsocksDeathRecipient"
+
+  override def binderDied(): Unit = {
+    Log.d(TAG, "[ShadowsocksDeathRecipient] binder died.")
+
+    mContext match {
+      case ss: Shadowsocks =>
+        inShadowsocks {
+          ss.unregisterCallback
+          ss.bindToService()
+        }
+      case _ =>
+    }
+  }
+
+}