Merge "Re-include btif::stack_manager" into main am: ec94418d am: 882a7363 am: 220ee80f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2844772



Change-Id: I87f735c94935c9f61c835e1b0d24e3d8903d39fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>