Refactor stable uris back up container class

* Update the name to more specific use-case of ID backup.
* Remove generation-modified and is_drm as they do not need to be
  restored.
* Add isDirty field to indicate if this row needs to be restored or not.

Bug: 239414235
Test: atest BackupIdRowTest
Change-Id: I0ffae5c7d938ba6f5cacd2b1f477f7cc2e0c783c
4 files changed