Modularize transactions for Almanac Device

Summary:
Depends on D19328. Ref T13120. Ref T12414.

Prior work has left us with just a NAME transaction here, which is straightforward to modularize.

Test Plan:

• Created and renamed devices.
• Tried to set no name, a bad name, a duplicate name (got errors).
• Tried to create/rename into a namespace I could not edit (got an error).
• Grepped for AlmanacDeviceTransaction::.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13120, T12414

Differential Revision: https://secure.phabricator.com/D19329