floss: Fix classic HID keyboard connection issue

A classic HID keyboard gets disconnected a few seconds after
bonding complete as connect_all_enabled_profiles wasn't
happening after service discovery as expected.
This patch adds an 'await' expression for the delayed action
'ConnectAllProfiles', so that Floss can connect to the HID profile
for classic keyboards once service discovery completes.

Bug: 261076243
Tag: #floss
Test: Manual test with classic/LE HID devices, A2DP, HFP on brya
Change-Id: I042f70477fb36b0ff45dc21eb861811eb854eae0