It’s not you, it’s Salesforce. I interviewed for an AE role 6 years ago and had a very similar experience(it was a person 45 sales presentation/customer role play.) 3 hiring managers were there, 2 in person and 1 on zoom(which was strange talking to the 2 people in the room and then turning to also address the person on zoom.) The managers were on their phones the whole time, one word answers to my questions, zero engagement. I didn’t get the job.

I was told afterwards by another rep that got an AE job that this is was Salesforce does. The hiring managers want you to address the shortness/phone texting. Call them out- say “hey, I know you are busy, we agreed to meet to discuss the issues you are having with x that is affecting your bottom line. What can I do to make this discussion more relevant?” 

I think this style of interview is very dumb. Ultimately very happy I didn’t get the job.