When freezing framework manifests, use aosp_arm64 target am: 6ac1197a06 am: 7c2002381f

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2256181

Change-Id: I2911daafa28c4dc1630c5b4fb5e598ebe918dd13
Signed-off-by: Automerger Merge Worker <[email protected]>