[automerger skipped] Support setting the default interface to null again. am: 876e5e16a9 am: 65c1bc7c5d am: ac350dddc6 am: 4d5310692c -s ours am: b284c51425 -s ours
am skip reason: Change-Id I5109d8da3aeb6c1f6523291d9e2ec92c64b5ad2d with SHA-1 876e5e16a9 is in history
Change-Id: I2193378052b1309503b77023da14917810e48e41
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