Revert "Upgrade zerocopy to 0.7.5" am: 918dbbab86 am: da1810f90d am: 3163e68036 am: cd495aa121 am: 4f49aae78a

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/2787439

Change-Id: If489b09ab32ba41fc8c0e85de6fead2dcca9cfef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>