Bluetooth: Allow for Pending status when moving back to BR-EDR

Fix issue where if a SCO connection is initiated during an AMP
OBEX transfer the fallback to BR-EDR fails and the OBEX connection
is disconnected.

When moving a channel back to BR-EDR L2CAP must allow for receiving
a Move Channel Response with Pending status before receiving the
Response with Success status.

Change-Id: I017bf607fa8ab5d0d582d61538c9a0e5ec25cd26
CRs-fixed: 341363
Signed-off-by: Peter Krystad <pkrystad@codeaurora.org>