(BUG) Soundbar inputs are not available 
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**Go over all the following points, and put an `x` in all the boxes that apply.
If you're unsure about any of these, don't hesitate to ask. We're here to help!**

-  [X] That _OAuth_ is Enabled for the SmartApp under the IDE.
-  [X] The SmartApp and Device Handler are using the latest code available.
-  [X] That Both the SmartApps and Device Handlers have been _Published for You_ in the IDE.

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## About Your Setup
-  How many devices are detected?: 1
-  Mobile App Version(Not required):
-  SmartApp Version:
-  Device Handler Version:
-  Homebridge Version: 1.1.6
-  NodeJS Version: 12.18.3

## Expected Behavior
Soundbar inputs should be available as buttons in HomeKit. This appears to be the "Media Input Source" that is listed in the Unknown Capabilities section of the log.

## Current Behavior
Soundbar can only be turned on or off

## Steps to Reproduce (for bugs)
Connected my Samsung N950 soundbar successfully. As a "Speaker" type it is not recognized at all in HomeKit. If I do the Other type it's available to be turned on or off.

## Context
**How has this issue affected you? What are you trying to accomplish?
**Providing context helps us come up with a solution that is most useful in the real world**

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Please include a copy of any relevant log output to assist in tracking down the bug

INFO: INFO: Your plugin version is up-to-date
NOTICE: Sending Plugin Status to SmartThings | UpdateAvailable: false | newVersion: 2.3.8
NOTICE: Temperature Unit is Now: (F)
WARN: Devices to Remove: (0) []
INFO: Devices to Update: (1)
GOOD: Devices to Create: (0) []
ALERT: Total Initialization Time: (1 seconds)
NOTICE: Unknown Capabilities: ["Music Player","Ocf","Audio Track Data","Execute","Media Playback Shuffle","Media Track Control","Media Input Source","Media Playback","Media Playback Repeat","Audio Track Addressing"]
INFO: SmartThings DeviceCache Size: (1)
INFO: WebServer Initiated...
INFO: Sending StartDirect Request to SmartThings | SendToLocalHub: (false)
INFO: Direct Connect Active | Listening at 172.16.0.200:8000