UIC-3273: Custom Unify_MultilevelSensor cluster

[Philippe Coval]

This patch was split in two, this version is the change that apply to
Unify, please refer to previous commit to undestand the flow, I after
the failed cherry-pick, I just used patch -p1 < patch and commited
only the changes that applies to Unify, the same operation should be
done for z-p-c project (in the opposite way).

Origin: ver_1.7.0-unstable-23-g38f24ffb48
Bug-SiliconLabs: UIC-3273
Origin: s.s.com/projects/UIC/repos/uic/pull-requests/2855
Relate-to: SiliconLabsSoftware/z-wave-protocol-controller#44
Forwarded: https://github.com/rzr/UnifySDK/tree/z-wave/core/zpc/main
Forwarded: SiliconLabsSoftware/z-wave-protocol-controller#143
Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: ptphan28

components/uic_dotdot/dotdot-xml/library.xml

@@ -501,4 +501,5 @@ applicable to this document can be found in the LICENSE.md file.
   <xi:include href="Unify_HumidityControl.xml" parse="xml"/>
   <xi:include href="Unify_Thermostat.xml" parse="xml"/>
   <xi:include href="Unify_FanControl.xml" parse="xml"/>
+  <xi:include href="Unify_MultilevelSensor.xml" parse="xml"/>
 </zcl:library>

components/uic_dotdot/zap/addon-helper.js

@@ -127,6 +127,7 @@ function isStruct(type) {
     case 'SSceneTable': return true
     case 'DeviceTypeStruct': return true
     case 'CredentialStruct': return true
+    case 'SensorValue': return true
     default: return false
   }
 }