HDMI: On <Report PA> from current path send <Set Stream Path>

This is an improvement for a previous patch - ag/30085389
This patch checks correctly if new path is equal to active path to send
the expected message.

Bug: 377428559
Test: atest com.android.server.hdmi
Flag: EXEMPT bugfix
Change-Id: Ie27088610bdb0caf4210076a522c077b7e405634