Merge "Fix race condition in CarrierTextController"

import android.text.TextUtils;

import android.util.Log;

import androidx.annotation.Nullable;

import androidx.annotation.VisibleForTesting;

import com.android.internal.telephony.IccCardConstants;

    private WifiManager mWifiManager;

    private boolean[] mSimErrorState;

    private final int mSimSlotsNumber;

    @Nullable // Check for nullability before dispatching

    private CarrierTextCallback mCarrierTextCallback;

    private Context mContext;

    private CharSequence mSeparator;

            new WakefulnessLifecycle.Observer() {

                @Override

                public void onFinishedWakingUp() {

                    mCarrierTextCallback.finishedWakingUp();

                    if (mCarrierTextCallback != null) mCarrierTextCallback.finishedWakingUp();

                }

                @Override

                public void onStartedGoingToSleep() {

                    mCarrierTextCallback.startedGoingToSleep();

                    if (mCarrierTextCallback != null) mCarrierTextCallback.startedGoingToSleep();

                }

            };