UpdateTxCount only when there is cosmos tx in block & fix vmbridge smb

[LeoGuo621]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• [x] Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• [ ] Wrote tests

• [ ] Updated relevant documentation (docs/)

• [ ] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• [ ] Reviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[codecov-commenter]

Codecov Report

Merging #3152 (910a6d6) into dev (006c451) will increase coverage by 0.00%. The diff coverage is 0.00%.

:exclamation: Current head 910a6d6 differs from pull request most recent head fee5bd7. Consider uploading reports for the commit fee5bd7 to get more accurate results

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@@           Coverage Diff           @@
##              dev    #3152   +/-   ##
=======================================
  Coverage   36.58%   36.59%           
=======================================
  Files         442      442           
  Lines       46428    46430    +2     
=======================================
+ Hits        16988    16990    +2     
  Misses      28179    28179           
  Partials     1261     1261           

Impacted Files	Coverage Δ
x/wasm/types/types.go	39.80% <0.00%> (-0.41%)	:arrow_down:

... and 1 file with indirect coverage changes