Enable a skipped PBAP test

PBAP/PSE/GOEP/SRMP/BI-02-C requires a first GET request
is being continued until the second GET request is received.

Sometimes it fails if the first request is handled quickly.

This change adds notes to delay the GET requests.

Flag: EXEMPT, test only
Bug: 293353312
Test: atest pts-bot:PBAP
Change-Id: I0c7f6bf0644fc8ba5b522010bf7698afd4bd481d