Bug fixes and added new callbacks

[mrajatttt]

Issue Number:

Description:

What are the changes? Why are we making them?

• Fixed empty message bug
• Added custom error as part of metadata (i.e metadata can now show errors)
• Added support for non-hilt chat session
• Added onDeepHeartBeat failure callback
• Added isChatSessionActive for customer to use
• Linked disableCSM with metrics manager
• Fixed bug while reconnecting (issue was intermittent due to a race condition)
• Added little bit more logging
• Fixed typing indicator still being shown in transcript -> calling removeTypingIndicator when onAppForeground
• Fixed attachment metadata while previewing it

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Functional backward compatibility:

Does this change introduce backwards incompatible changes? [YES/NO]

Does this change introduce any new dependency? [YES/NO]

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Testing:

Is the code unit tested?

Have you tested the changes with a sample UI (e.g. Android Mobile Chat Example)?

List manual testing steps:

• Add Steps below:

Here are a list of manual test cases to run through:

• Initiating chat and connecting with an agent
• Retrieving transcript
• Disconnecting from chat
• Sending a message to the agent
  • See typing bubbles on agent side
  • See read/delivered receipt on client side
  • Receiving a message from the agent
  • See typing bubbles on client side
  • See read/delivered receipt on agent side
  • Sending an attachment to the agent (try .txt, .pdf, .jpg)
  • Preview the attachment on click
  • Receiving an attachment from the agent
  • Preview the attachment on click
• Close the application (Without ending chat) → open app again → Start chat → Should Retrieve transcript from a previous chat session