* correct behavior of back button on Android

* removing of annoying debug logs on Android

client/android/src/org/amnezia/vpn/VPNServiceBinder.kt

@@ -196,7 +196,6 @@ class VPNServiceBinder(service: VPNService) : Binder() {
         try {
             mListener?.let {
                 if (it.isBinderAlive) {
-                    Log.i(tag, "Dispatching event: binder alive")
                     val data = Parcel.obtain()
                     data.writeByteArray(payload?.toByteArray(charset("UTF-8")))
                     it.transact(code, data, Parcel.obtain(), 0)

client/android/src/org/amnezia/vpn/qt/VPNActivity.kt

@@ -99,8 +99,6 @@ class VPNActivity : org.qtproject.qt.android.bindings.QtActivity() {
         if (!isBound) {
             Log.d(TAG, "dispatchParcel: not bound")
             return
-        } else {
-            Log.d(TAG, "dispatchParcel: bound")
         }
 
         val out: Parcel = Parcel.obtain()
@@ -331,12 +329,4 @@ class VPNActivity : org.qtproject.qt.android.bindings.QtActivity() {
             onActivityMessage(UI_EVENT_QR_CODE_RECEIVED, extra)
         }
     }
-
-    override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
-        if (keyCode == KeyEvent.KEYCODE_BACK && event.repeatCount == 0) {
-            onBackPressed()
-            return true
-        }
-        return super.onKeyDown(keyCode, event)
-    }
 }