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: 2fbaf455

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

Change-Id: I94269e991fffe078139e79eb60976108a17ef8b4