Fixed the debug message

import android.annotation.Nullable;

import android.annotation.SystemApi;

import android.net.LinkAddress;

import android.net.LinkProperties;

import android.os.Parcel;

import android.os.Parcelable;

import android.telephony.Annotation.DataFailureCause;

           .append(" mtu=").append(getMtu())

           .append(" mtuV4=").append(getMtuV4())

           .append(" mtuV6=").append(getMtuV6())

           .append(" handoverFailureMode=").append(getHandoverFailureMode())

           .append(" handoverFailureMode=").append(failureModeToString(mHandoverFailureMode))

           .append(" pduSessionId=").append(getPduSessionId())

           .append(" defaultQos=").append(mDefaultQos)

           .append(" qosSessions=").append(mQosSessions)