HOGP: Clear pending operations for a given device on connect

If there are any HID operations scheduled after disconnect, mark the
device as no longer executing after establishing connection. Otherwise
we'll be unable to send any HID commands to it.

Change-Id: Ie1bb622388a3bcb574dec3dde76ef4518ee1102f
(cherry picked from commit 4362b8c559575a83897a5af55202ce2c1d19925c)