Fix race condition in LE Create Connection Cancel handling

Message with description of the issue being fixed:
https://android-review.googlesource.com/c/platform/system/bt/+/646600#message-4781dd6e3e74d8b11ef716bbf58edbc64645f18c

Bug: 77429706
Change-Id: I1c076c7f033fc3d1aaf47887ce691b6325721d85
(cherry picked from commit 0d1d8e09e2cd2b14b4daa2d342eb40ccd66e401c)