Simplify method id handling when recording method trace events am: 7ab239950b

Original change: https://android-review.googlesource.com/c/platform/art/+/2411665

Change-Id: Ibb5b920b9d8ea8785be8327e0e35f235d2e81e6b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>