Sets 'verity_update_state' in init.rc

This is required since Android 12, because
CtsNativeVerifiedBootTestCases will read property
"partition.${partition}.verified.hash_alg" to
check that sha1 is not used.

Also see https://r.android.com/1546980 for more details.

Bug: 175236047
Bug: 203720638
Test: build and boot a device
Change-Id: I300265f4af9c2781d40537f391bda9eaf62c27ba