Just hours after Elon Musk took to Twitter to reveal to the world that Tim Cook wouldn't take his phone calls when he was looking for a bailout, Morgan Stanley has now come out and admitted that Apple's entrance into the self-driving market creates "a new Tesla bear case". Tesla uber-bull Adam Jonas wrote in a note on Tuesday: “Apple’s potential entry into autos represents perhaps the most credible/formidable bear case for Tesla’s stock that investors have had to consider for some time.” If “Apple…