Update zh-cn values and bump version

mobile/build.sbt

@@ -4,8 +4,8 @@ enablePlugins(AndroidGms)
 android.useSupportVectors
 
 name := "shadowsocks"
-version := "4.3.0"
-versionCode := Some(196)
+version := "4.3.1"
+versionCode := Some(197)
 
 proguardOptions ++=
   "-dontwarn com.google.android.gms.internal.**" ::

mobile/src/main/res/values-zh-rCN/strings.xml

@@ -15,10 +15,6 @@
 <string name="stat_summary">"上传: \t%3$s\t↑\t%1$s/s
 下载: \t%4$s\t↓\t%2$s/s"</string>
 
-<plurals name="bytes">
-<item quantity="other">"字节"</item>
-</plurals>
-
 <string name="connection_test_pending">"检查网络连接"</string>
 <string name="connection_test_testing">"测试中…"</string>
 <string name="connection_test_available">"连接成功：延时 %d 毫秒"</string>