연락처 허락 코드를 동작하면 꺼지는 현상 문의

안녕하세요,
플러터 수강생 입니다.

Android Emulator로 연락처 앱을 잘 동작시켰고, 간단한 응용 예제(삭제 기능, 전화번호 보이기 등)를 진행 후에 연락처 요청 
코드(await ContactsService.getContacts();)를 실행하면 Lost connection to device. 라는 문구와 함께 앱이 자동으로 꺼집니다..

연락처 허용하는 과정에서 문제가 발생하는것으로 추정되는데, 알려주신 대로 잘 진행하고 있는데 며칠동안 시도하다 이렇게 글을
남깁니다. 이게 맞는지는 잘 모르겠지만 콘솔창에 적힌 로그들을 함께 올립니다.

I/flutter ( 3688): 허락됨
E/AndroidRuntime( 3688): FATAL EXCEPTION: pool-2-thread-1
E/AndroidRuntime( 3688): Process: com.example.contact, PID: 3688
E/AndroidRuntime( 3688): java.lang.RuntimeException: An error occurred while executing doInBackground()
E/AndroidRuntime( 3688): 	at android.os.AsyncTask$4.done(AsyncTask.java:415)
E/AndroidRuntime( 3688): 	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
E/AndroidRuntime( 3688): 	at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
E/AndroidRuntime( 3688): 	at java.util.concurrent.FutureTask.run(FutureTask.java:271)
E/AndroidRuntime( 3688): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/AndroidRuntime( 3688): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/AndroidRuntime( 3688): 	at java.lang.Thread.run(Thread.java:920)
E/AndroidRuntime( 3688): Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.contacts.ContactsProvider2 uri content://com.android.contacts/data from pid=3688, uid=10146 requires android.permission.READ_CONTACTS, or grantUriPermission()
E/AndroidRuntime( 3688): 	at android.os.Parcel.createExceptionOrNull(Parcel.java:2425)
E/AndroidRuntime( 3688): 	at android.os.Parcel.createException(Parcel.java:2409)
E/AndroidRuntime( 3688): 	at android.os.Parcel.readException(Parcel.java:2392)
E/AndroidRuntime( 3688): 	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:190)
E/AndroidRuntime( 3688): 	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:142)
E/AndroidRuntime( 3688): 	at android.content.ContentProviderProxy.query(ContentProviderNative.java:481)
E/AndroidRuntime( 3688): 	at android.content.ContentResolver.query(ContentResolver.java:1219)
E/AndroidRuntime( 3688): 	at android.content.ContentResolver.query(ContentResolver.java:1151)
E/AndroidRuntime( 3688): 	at android.content.ContentResolver.query(ContentResolver.java:1107)
E/AndroidRuntime( 3688): 	at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin.getCursor(ContactsServicePlugin.java:521)
E/AndroidRuntime( 3688): 	at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin.access$500(ContactsServicePlugin.java:55)
E/AndroidRuntime( 3688): 	at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin$GetContactsTask.doInBackground(ContactsServicePlugin.java:451)
E/AndroidRuntime( 3688): 	at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin$GetContactsTask.doInBackground(ContactsServicePlugin.java:427)
E/AndroidRuntime( 3688): 	at android.os.AsyncTask$3.call(AsyncTask.java:394)
E/AndroidRuntime( 3688): 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
E/AndroidRuntime( 3688): 	... 3 more
I/Process ( 3688): Sending signal. PID: 3688 SIG: 9
Lost connection to device.