In the HD7 MemoPad (Android 4.2), launch email composer, click the "contacts" icon, and the list appears. Select a contact and that name/email address is propagated into the TO field, just as it should be.
Summon "send email" via voice command ("OK Google, send mail") and touch PICK...
Contacts list via "send mail" voice command
Summon "send email" via voice command ("OK Google, send mail") and touch PICK...
Contacts list via "send mail" voice command