c2-codecs: fixes memory slot leak am: 1fecb9d14c am: 79eef2a647 am: b10d08a91a

Original change: https://android-review.googlesource.com/c/device/generic/goldfish-opengl/+/1691215

Change-Id: Iea9b6f232b431d8fceaf4a4bdc17ad860b7c02c7