RDKEMW-14381: Add the new API getTimeSinceWakeup in PowerManager Plugin

[dkumar798]

Reason for change: Add the new API getTimeSinceWakeup in PowerManager Plugin
Test Procedure: Check the Ticket
Risks: Low
Priority: P1
version: Patch
Signed-off-by:Dineshkumar P [dinesh_kumar2@comcast.com]

[github-actions]

Documentation Auto-Generated

Documentation has been automatically generated for the changed plugins and committed to this PR branch.

The generated documentation files have been added to the PR for review.

[Copilot]

Pull request overview

Adds a new PowerManager JSON-RPC/API surface for retrieving elapsed time since device wakeup, updating both the public interface header and the generated API documentation.

Changes:

• Documented the new getTimeSinceWakeup method in docs/apis/PowerManager.md (including request/response examples).
• Added GetTimeSinceWakeup to the Exchange::IPowerManager interface.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

File	Description
docs/apis/PowerManager.md	Adds documentation entry and examples for the new getTimeSinceWakeup API and adjusts subsequent example IDs.
apis/PowerManager/IPowerManager.h	Introduces the new GetTimeSinceWakeup interface method for implementation by the PowerManager plugin.

[Copilot]

The secondsSinceWakeup field is documented as uint32, but the response example shows it as an empty string. Please update the example to return a numeric value (e.g., 0) and ensure the documented type matches the actual JSON value type used by the API.

Suggested change

	"secondsSinceWakeup": ""
	"secondsSinceWakeup": 0

[Copilot]

@brief contains a duplicated word (“Get the the Wakeup Time”). Please fix the wording.

Suggested change

	// @brief Get the the Wakeup Time
	// @brief Get the Wakeup Time

[github-actions]

Documentation Auto-Generated

Documentation has been automatically generated for the changed plugins and committed to this PR branch.

The generated documentation files have been added to the PR for review.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[github-actions]

Documentation Auto-Generated

Documentation has been automatically generated for the changed plugins and committed to this PR branch.

The generated documentation files have been added to the PR for review.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.