Don't change the video recording frame rate if it is not requested.

o set the default video frame rate to the current frame rate being used
o add check on whether the requested frame rate is supported
o fix an issue where the hardware video encoder setting was bypassed
o increases the max frame rate from 30 t0 120 frames per second
  the actual frame rate will be clipped if the requested frame rate is too
  high when recording starts by checking the hardware encoder capabilities

Change-Id: I1b47671d74da0ebcb9601bdca390d430cc048fbc