legacy: Explicitly include stack/include/bt_dev_class am: 91900a5c am:...

legacy: Explicitly include stack/include/bt_dev_class am: 91900a5c am: 0f8de088 am: ef796863 am: c8437c7f

Original change: https://android-review.googlesource.com/c/platform/system/bt/+/1825224

Change-Id: I766127ac688a0df32c09249e0a9e37d359d46c86