Clarify in comment Perfetto binary size flags. am: dce85ffe78

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2528602

Change-Id: I153ad865dedb8ccfbdabd7799bdb67e3283784a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>