Fix EmitSequenceData bug

If sequence data is written and the number of ops reaches the maximum,
op data will corrupt the block data because location of block data is
stale after writing sequence data. Fix by resetting location of block
data after EmitSequenceData()

Test: th
Bug: 313962438
Change-Id: Ib53b81772ba341cdf5c240baaee7c10725a365c3
2 files changed