[automerge] Disable persistent bookkeeping if dedupDownloadWithEtag is false. 2p: 75f888c634

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/mobile-data-download/+/19753984

Bug: 243926815
Change-Id: I7b8912abf78ca77ffc62287de6ac262a43c98c79