Android: Scenario where onPause is called but not onStop?

Androidmanifest.xml

 <activity
            android:name=".Test"
            android:theme="@style/AppTheme.Base.FullScreen">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".TestOne"
            android:theme="@android:style/Theme.Dialog">// this line is very important

        </activity>

Test.java

package com.test.test;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
/**
 * Created by narendra on 3/3/17.
 */

public class Test extends AppCompatActivity {


    private final static String TAG = "Test";

    @Override
    protected void onStart() {
        super.onStart();
        Log.i(TAG,"onStart");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.i(TAG,"onRestart");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.i(TAG,"onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.i(TAG,"onPause");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.i(TAG,"onStop");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.i(TAG,"onDestroy");
    }

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test_lay);
        Log.i(TAG,"onCreate");
        Button btn = (Button) findViewById(R.id.id);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(Test.this, TestOne.class));
            }
        });


    }
}

TestOne.java

package com.test.test;

import android.app.Activity;
import android.content.DialogInterface;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.view.View;
import android.widget.Button;


/**
 * Created by narendra on 6/6/17.
 */

public class TestOne extends Activity {


    private final static String TAG = "TestOne";

    @Override
    protected void onStart() {
        super.onStart();
        Log.i(TAG,"onStart");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.i(TAG,"onRestart");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.i(TAG,"onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.i(TAG,"onPause");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.i(TAG,"onStop");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.i(TAG,"onDestroy");
    }

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test_lay);
        Log.i(TAG,"onCreate");
        Button btn = (Button) findViewById(R.id.id);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder;
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                    builder = new AlertDialog.Builder(TestOne.this, android.R.style.Theme_Material_Dialog_Alert);
                } else {
                    builder = new AlertDialog.Builder(TestOne.this);
                }
                builder.setTitle("Delete entry")
                        .setMessage("Are you sure you want to delete this entry?")
                        .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                // continue with delete
                            }
                        })
                        .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                // do nothing
                            }
                        })
                        .setIcon(android.R.drawable.ic_dialog_alert)
                        .show();
            }
        });


    }
}