updated ecl: added method to return ekf bias state
updated ecl: added method to return ekf bias state

Signed-off-by: tumbili <238a1843d81dd7fbe80b5c1b99515c4ba8c94d0d@px4.io>

Aerotenna/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,dagar/Firmware,darknight-007/Firmware,darknight-007/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,darknight-007/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,krbeverx/Firmware,dagar/Firmware,PX4/Firmware,jlecoeur/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,PX4/Firmware,PX4/Firmware,PX4/Firmware,darknight-007/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,PX4/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,dagar/Firmware,jlecoeur/Firmware,PX4/Firmware,acfloria/Firmware,darknight-007/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,Aerotenna/Firmware,PX4/Firmware,krbeverx/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,dagar/Firmware,acfloria/Firmware,jlecoeur/Firmware,krbeverx/Firmware,krbeverx/Firmware,acfloria/Firmware