GapState_t missing information?

The description of `Gap::GapState_t` is as follows:

```
/* Describes the current state of the device (more than one bit can be set). */
```

Shouldn't this structure contain information about scanning and not just advertising/connected?

Start by reading the `Gap::GapState_t` definition and its surrounding API documentation. Determine whether scanning state is intended to be represented alongside advertising and connection state, then document the decision and any required API changes; the issue is done when the state model and its description are unambiguous.

Written by the indexing model from the issue text.