Merge "simpleperf: move ParseSymbols* inside ElfFile class." am: 1f7cc3b439 am: b4eade4fb7

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/1353746

Change-Id: Ib78b0a8bf37c4f9a7414726fa67ca4664e87d433