Revert "Revert "Expose extent_ranges for libsnapshot to use in resolving..."" am: c1c9305479 am: 2d884d50e4 am: 81bd17f28c am: 238816cf2f

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/1412367

Change-Id: I2975331c3598cf329e12646f4a3affb7bfb9b85b