[SDL 0063] Display name parameter

[theresalech]

Proposal: Display name parameter

This proposal is about deprecating the parameter displayType and replace it with displayName.

Review: smartdevicelink/sdl_evolution#184

Steering Committee Decision:

This proposal has been accepted by the Steering Committee. After much discussion about the displayName parameter, it was decided that the parameter should be kept as there are specific use cases where the parameter is helpful for OEMs, notably OEM-created apps. In the future, we may want to have the displayNames for certified head units recorded publicly for reference.