clean up TokenCancelAirdrop null param failure

[kimbor]

Problem

Clean up the way empty parameters are treated in TokenCancelAirdrop transactions

Solution

-Add test for TokenCancelAirdrop empty parameters
-Throw PrehandleException on empty parameters earlier in the workflow
-Change the PreHandleException that is thrown from INVALID_ACCOUNT_ID to INVALID_PENDING_AIRDROP_ID, to match the similar exception condition in TokenClaimAirdrop

Alternatives

No response