Pick contact ctonract from the official docs.

PickContactContract.java

    /**
     * An {@link ActivityResultContract} to request the user to pick a contact from the contacts
     * app.
     * <p>
     * The result is a {@code content:} {@link Uri}.
     *
     * @see ContactsContract
     */
    public static final class PickContact extends ActivityResultContract<Void, Uri> {

        @NonNull
        @Override
        public Intent createIntent(@NonNull Context context, @Nullable Void input) {
            return new Intent(Intent.ACTION_PICK).setType(ContactsContract.Contacts.CONTENT_TYPE);
        }

        @Nullable
        @Override
        public Uri parseResult(int resultCode, @Nullable Intent intent) {
            if (intent == null || resultCode != Activity.RESULT_OK) return null;
            return intent.getData();
        }
    }