Merge "system/stack/*: Fix -Wmissing-prototypes warnings" into main am: cfea2a3d am: c0e7dfc6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3381253



Change-Id: If2c1a2c97e653b26e3d802ba741d13bf4cae7507
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>