add private key logic

Author: soaryong-stamper

suikotlin/src/androidTest/java/io/cosmostation/suikotlin/ExampleInstrumentedTest.kt

@@ -1,13 +1,11 @@
 package io.cosmostation.suikotlin
 
-import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.ext.junit.runners.AndroidJUnit4
-
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.*
 import org.junit.Test
 import org.junit.runner.RunWith
 
-import org.junit.Assert.*
-
 /**
  * Instrumented test, which will execute on an Android device.
  *