Merge "Floss: disallow replacing callbacks in reactables" am: 3f460836

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2291633



Change-Id: Iae1a1f50ebc2c21782ebe78f4fe7f3e806450c02
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>