Merge "IA2: Split out mainloop handler sync for tests" into main am:...

Merge "IA2: Split out mainloop handler sync for tests" into main am: 1a1d0e37 am: c1c10b4a am: 10515a93

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2822870



Change-Id: I9c36207e15738089f958c795dd9e897feb8f324e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>