Enabling time lapse in setProfile, added setCaptureRate

- Time lapse is automatically enabled in setProfile() if a time lapse
  profile is selected. Also audio setup is skipped for time lapse.
- Added setCaptureRate() to set the frame capture rate, which may be
  different from the video playback rate.
- Getting rid of enableTimeLapse() since setProfile() and
  setFrameCaptureDelay() do its job now.

Change-Id: Ifd9f89cea0d05ffbefc22eac4ea5d34147cc1fbe