Do I Have to list my new apartment in my chapter 7 bankruptcy?

Landlords don't have the option to cancel your lease because you filed bankruptcy.

It sort of sounds like you are asking for permission to hide information about a deposit you paid for an apartment from the bankruptcy court. That is called BANKRUPTCY FRAUD. If you want to meet some of the gals from the Real Housewifes series, a good way to do this is by getting to sent to prison for this crime, where several of these ladies are also doing time for this crime in prisons that are not really country club worthy.

You must list it but the landlord cannot kick you out as long as you continue to pay on time. Attorney is correct and advising you correctly.

You are not only required to list the security deposit you hand to the landlord on Schedule A/B, you are required to list the lease you are going to sign/have signed on your bankruptcy schedules as an executory contract because it is a lease that is not expired (if it's in effect when you file). If you leave it off, you risk not getting a discharge for hiding a potential asset. It can also be considered bankruptcy fraud (especially since you are seeking advice publicly on whether you can hide the assets from your creditors and the trustee). Whether your new landlord cancels the lease is up the landlord and the language in your lease.

A deposit is considered an asset, so it must be listed on your schedule of assets but it is not necessary to notify your new landlord of your bankruptcy. It makes sense to secure an apartment before filing because most landlords will run a credit check and refuse to rent to you if you are involved in an active bankruptcy. But it's really none of their business if you file for bankruptcy after securing the apartment lease, as long as you make all your rent payments on time.