Fix bluetooth aidl crash

[Description]
during servicefuzz test, when AIDL has already been closed, then send
packet will cause crash
[Root Cause]
send function doesn't check AIDL mstate and it may use illegal socket fd
[Solution]
add AIDL state check before send

[Test Report]
test bluetooth servcefuzz pass

Change-Id: Id10c72269a392562798a6e46e9753402db423ee3
Bug: 308904509