Merge "Floss: Check for C++ output dir instead of Rust output dir" am: c5b2dd89 am: e632ede7

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2124840



Change-Id: I617f18b63e85b6e1f9f8c15a15c9cf584f129c04
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>