IOMX: do not clear buffer if it's allocated by component am: ea76573aa2 am: 86d9bb9141 am: dfe5b5193c am: b308b1a5d9 am: 87415a74ee am: 130eb563b8 am: 106a9050b9 am: 53de578e88 am: 295244de61 am: 17b0bdf4e8 am: ea65b73f84 am: 58bb33f447
am: 6d50452127

Change-Id: I5ccff32fda63c26a2163d9ca5f471d1644330684