Redact ISOBMFF boxes with 'free'

Test: atest MediaStore_Video_MediaTest android.os.RedactingFileDescriptorTest
Bug: 135499138
Change-Id: Idaa8ad30300d5427f91bb2543be3152881018cf6
(cherry picked from commit 4ec5fda3d6edd9b9b8858e6961ba53f31a8c03fc)
2 files changed