MediaMuxer:SetCaptureRate for GCA SlowMotionRecord

MediaMuxer would find 'time-lapse-fps' value in input format from GCA
and pass it on to MPEG4Writer for SlowMotionRecord.

Bug: 138995916

Test: atest CtsMediaTestCases
      atest CtsMediaTestCases:android.media.cts.MediaMuxerTest

Change-Id: I6af102540ddd439b203351ebba07eabf89f2d330