[automerged blank] Add new metrics to report averages as sum and count 2p: c9b7f61cdf

Blank merge reason: Change-Id I88741e38b5e9fa784efa57cc9ef079dd7ee4c447 with SHA-1 0a3b31c925 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/art/+/19457560

Bug: 229618060
Bug: 240165346
Change-Id: Ia3784d90e9dca3f05a7bc1298bec5e1f05439c60
Merged-In: I88741e38b5e9fa784efa57cc9ef079dd7ee4c447