dont create router.ping file on Android to reduce flash wear

history.txt

 2012-07-24 zzz
  * LookaheadInputStream: Fix bug causing gunzip fails, esp. on Android
+ * Router: Don't create router.ping file on Android
  * SSLEepGet: Fix on Android (ticket #668)
 
 2012-07-21 zzz

router/java/src/net/i2p/router/Router.java

@@ -255,7 +255,8 @@ public class Router implements RouterClock.ClockShiftListener {
         // *********  Start no threads before here ********* //
         //
         // NOW we can start the ping file thread.
-        beginMarkingLiveliness();
+        if (!System.getProperty("java.vendor").contains("Android"))
+            beginMarkingLiveliness();
 
         // Apps may use this as an easy way to determine if they are in the router JVM
         // But context.isRouterContext() is even easier...