Merge "Improve exception logging for system backup/restore" into sc-dev am:...

Merge "Improve exception logging for system backup/restore" into sc-dev am: 8f589c02 am: 2b6aa321 am: 0146d279

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15123973

Change-Id: I0d1c2e4f245b0685af6894c10f888f87907a98d0