Allow multiple output formats for runtime metrics am: e22579cc46

Original change: https://android-review.googlesource.com/c/platform/art/+/2085483

Change-Id: I82edc5fa76cd08a6e6eb3c2dc678e70a7492f6d8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>