Merge "releasetools: Support generating downgrade A/B OTAs." into nyc-dev am: 5a4508bcef am: e7847765a6 am: a7dcbfb2d8 am: 00f2147e70
am: aaabaf74d6  -s ours

Change-Id: I08b98aed29b97c015df4d6229fee7e8b0dd9f8b3