HMD is crossing its fingers for a second summer of Barbie. The company, which has exclusively sold phones under the Nokia brand name for the past seven years, has announced plans to release a Barbie-branded flip phone this July in partnership with Mattel. It’s one of several devices HMD has on the way for this summer, which also include a new Nokia-branded retro feature phone, and an HMD-branded smartphone. Finally, the company has also announced early plans for a new development platform…