Merge "Move from libbacktrace to libunwindstack." am: dec36238 am:...

Merge "Move from libbacktrace to libunwindstack." am: dec36238 am: ffd95c6e am: 63405a87 am: 20719231

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2046923



Change-Id: Iccf4b89588b34aaaf205188e118231303c66aabc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>