[PATCH v2] Fix DAP Stop & Continue event bugs

[Tom Tromey]

>>>>> "Simon" == Simon Farre via Gdb-patches <gdb-patches@sourceware.org> writes:

Simon> Removed type annotation as it broke gdbpy.
Simon> Fixes a bug in the stop and continue event handlers in the DAP code.

Simon> Event handlers used the `gdb.selected_thread` which may or may not be
Simon> null at the time the event handler is called. It may also return the
Simon> wrong thread. The event parameter holds the necessary data.

Thank you.  This is ok.

Tom