Decoder: Memset allocated dynamic and static buffer to zero

Bug: 111407302
Bug: 111208713
Bug: 111128067
Bug: 111762807
Bug: 111762100
Bug: 111761624
Bug: 112328051
Bug: 112329563
Bug: 112326322
Bug: 112205113
Bug: 112204376
Test: manual
Change-Id: I35e6069a26ee5ef4c0fff111df255a5eddff78ae