Removing compression bit from v3 op

We don't need the compression bit in v3 op since all operations will
have the same compression per COW Device and it will be stored within the COW header.
We can check to see if an operation contains compressioned data by
checking data_length and see if it's less than BLOCK_SZ

Test: 4 critical OTA paths
Change-Id: I3f86756d83bf54bf6efd15d9cb7ac064eefdd949