fix all issues for lollipop

src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.github.shadowsocks"
-    android:versionCode="74"
-    android:versionName="2.2.6">
+    android:versionCode="75"
+    android:versionName="2.3.0">
 
   <uses-permission android:name="android.permission.INTERNET"/>
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

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

@@ -827,10 +827,6 @@ class Shadowsocks
 
     copyAssets(System.getABI)
 
-    if (Build.VERSION.SDK_INT >= 20) {
-      copyToSystem()
-    }
-
     val ab = new ArrayBuffer[String]
     for (executable <- Shadowsocks.EXECUTABLES) {
       ab.append("chmod 755 " + Path.BASE + executable)

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

@@ -160,12 +160,8 @@ class ShadowsocksNatService extends Service with BaseService {
       })
 
       val args = "pdnsd -c " + Path.BASE + "pdnsd.conf"
+      val cmd =  Path.BASE + args
 
-      val cmd = if (Build.VERSION.SDK_INT >= 20) {
-        "/system/bin/" + args
-      } else {
-        Path.BASE + args
-      }
       if (BuildConfig.DEBUG) Log.d(TAG, cmd)
       Console.runRootCommand(cmd)
     }
@@ -190,11 +186,7 @@ class ShadowsocksNatService extends Service with BaseService {
     ConfigUtils.printToFile(new File(Path.BASE + "redsocks.conf"))(p => {
       p.println(conf)
     })
-    val cmd = if (Build.VERSION.SDK_INT >= 20) {
-      "/system/bin/" + args
-    } else {
-      Path.BASE + args
-    }
+    val cmd = Path.BASE + args
     Console.runRootCommand(cmd)
   }