Reset BTA conn_id on close

Otherwise we use an invalid conn_id rather than opening a new client,
which causes the SDP queue to get stuck.

Bug: 263050668
Test: QA
Change-Id: Icc7533ed0588128fa044694d4c43f09bac6d93ed
(cherry picked from commit 6f5e5bff)
Merged-In: Icc7533ed0588128fa044694d4c43f09bac6d93ed
Merged-In: I72cb849a2eb56de6c7aea149bb24e281ec2cf6ac
(cherry picked from commit b6815dc9)
Merged-In: Icc7533ed0588128fa044694d4c43f09bac6d93ed
(cherry picked from commit 0567e3dacf7c3d9d99907f3f9ff84c29c9460659)
Merged-In: Icc7533ed0588128fa044694d4c43f09bac6d93ed