HMI does not update capabilities based on template

[jacobkeeler]

When switching templates while an app is subscribed to DISPLAYS system capabilities, the HMI should send an OnSystemCapabilityUpdated message with the new template's capabilities, but instead it sends a static set of capabilities from Abstract/data.js (which also currently have incorrect buttonCapabilities, since they include RC buttons).

Reproduction Steps:

1. App is registered with MEDIA and NAVIGATION app HMI types
2. App sends GetSystemCapability(DISPLAYS) with subscribe=true
3. App sends Show request with templateConfiguration, templateName="NON-MEDIA"

Expected behavior:

App receives SUCCESS response to Show request
App receives OnSystemCapabilityUpdated(DISPLAYS) with the display capabilities for the NON-MEDIA template

Actual behavior:

App receives SUCCESS response to Show request
App receives OnSystemCapabilityUpdated(DISPLAYS) with a set of display capabilities which does not correspond to any template.

[ShobhitAd]

Closed via #590