pixel-sepolicy: pixelstats: sysfs vendor_mm am: 77f7028279

Original change: https://android-review.googlesource.com/c/platform/hardware/google/pixel-sepolicy/+/3156062

Change-Id: Ic7142951b16fbe2b348170a9c91b90c6613dca76
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>