Bluetooth: thread-safe callback invocation

Bug: 65596701
Test: manual
Change-Id: I92a436328a3070ea842e8e652891e485406c2ed7
Merged-In: I92a436328a3070ea842e8e652891e485406c2ed7
(cherry picked from commit 3eb569fc72781857f1f2722bb645a6090a9b53ce)
1 file changed