Adjust existing connections after ecosystem base interval is set

When ecosystem base interval is set, every new LE connection update would take it into account.

However, existing connections won't change parameters, and controller might have trouble scheduling them. Therefore, trigger update, and intervals will get adjusted to ecosystem base interval.

Flag: l2cap_update_existing_conn_interval_with_base_interval
Test: connect with HID device, then with LE Audio device
Test: m -j;
Bug: 346968428
Bug: 348209161
Change-Id: I197a11053707b0022579e25e2c1607a08df504cc