Merge "libprefetch: library to prefetch data using tracing." into main am:...

Merge "libprefetch: library to prefetch data using tracing." into main am: e3675507 am: 7ca65153

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3364432



Change-Id: Ibd2a25d403c503bb75eb8d5b267249ba861e5c1d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>