Move SetPhy and SetDataLength after connection open

Since other patch was merged in. Move these action to origin place
for keeping origin flow.

Other patch information:
Remove unused entry into l2cap
I77f5e61be5162e6539b47823512f4537fedec392

Tag: #feature
Bug: 233028500
Test: manual
Change-Id: Iec667cc5f3bd228c7ce72409b90bc3925cd636f9