RDKBWIFI-364 : Generalizing bus abstraction functions for retrieving …

[Nikita-Hakai]

…and setting bus data property types.

This reverts commit 13a7190.

[Copilot]

Pull request overview

This PR reverts commit 13a7190... and updates the WLAN emulator’s bus abstraction to support generalized “property-based” bus payloads (via bus_data_prop_t) when retrieving and setting bus data property types, aligning RBUS event/method handling with the new payload representation.

Changes:

• Updated event callback signatures in UI/test code to consume bus_data_prop_t and improved allocation/error handling for string payload copying.
• Enhanced the RDKB RBUS layer to parse rbusObject_t into a linked list of bus_data_prop_t entries (including deep-copied string/bytes values) and to free that structure safely.
• Updated public headers to reflect the new callback types.

Reviewed changes

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

Show a summary per file

File	Description
src/ui/wlan_emu_ui_mgr.cpp	Switches webconfig event handler to bus_data_prop_t and adds payload validation / safer allocation.
src/tests/wlan_emu_test_param_stats_get.cpp	Updates stats subscription handler signature and improves cleanup/error paths.
src/bus/rdkb/wlan_emu_bus.cpp	Implements RBUS↔bus property conversion for events/methods and adds cleanup for property lists.
inc/wlan_emu_ui_mgr.h	Updates callback function pointer types to bus_data_prop_t.
inc/wlan_emu_test_params.h	Updates stats handler declaration to bus_data_prop_t.

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