Bluetooth: OPP: set csv format as acceptable shareinbound types

Adding csv format to acceptable inbound types, to be able to
receive these file formats from remote device.

Change-Id: I4ef8da4672d021412f806276c9bc292db17bf0c5
(cherry picked from commit 35d4d52191ed43bc205271d2a91097c2e62cd598)
(cherry picked from commit 6c3230e43a1bb14fc41ff2cd53995775c4eb3eb3)
(cherry picked from commit 063a7fab243672bae36259f7199173c486780802)