[Watson Unity sdk] Apk build not working properly in Il2cpp backend scripting

[YogeshShre]

`- [ ] Steps to reproduce
Go to Examples folder of the unity sdk.
select Example Text to speech V1.
switch the platform to android.
Build the app using the setting the backend scripting to Il2cpp.

• Expected behavior
  It works fine in the editor and also in the build with mono backend scripting. It should have responded to the text entered.
• Actual behavior
  The app opens but does not responds to any text entered
• IBM Watson SDK for Unity version
  I am using Watson SDK for Unity of version 5.0.2 and Unity SDK core of 1.2.3.