When a breakpoint auto-continues, the event handler receives a "stopped
but restarted" event. During the transition where we step over the
breakpoint (before continuing), the public state hasn't yet been set to
running. This caused the `DefaultEventHandler` to call
`ExecutionContextRef` with `adopt_selected=true`, which would fetch
stale thread/frame state and needlessly (and incorrectly) interrupt the
target to compute the execution context (used by the statusline). This
PR fixes that by not doing that.
Fixes#190956
Co-authored-by: Jim Ingham <jingham@apple.com>
e8c8cbb06a