chore: read bridge gas fee estimates from gasFeeEstimatesByChainId

[micaelae]

Explanation

Changes the gasFeeEstimates source used in quote metadata calculations to the chain-agnostic gasFeeEstimatesByChainId state. Resulting values will be the same as before but this sets up the clients for removing global selected network references

See CHANGELOG for required client changes

Draft extension PR: MetaMask/metamask-extension#37593

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
This is a breaking state/selector contract change and it touches fee calculation inputs; incorrect wiring or missing per-chain estimates could surface as zero/incorrect displayed network fees.

Overview
selectBridgeQuotes now derives gas pricing from gasFeeEstimatesByChainId keyed by the quote’s source chain (and returns 0 gas fees when estimates are unavailable), removing reliance on a globally selected network.

Tests and utilities were updated to reflect the new state shape and chain-id formatting (toHex), and the bridge-controller’s metrics tracking generics were tightened; the changelog marks this as a breaking client-facing change.

^{Written by Cursor Bugbot for commit 1469a17. This will update automatically on new commits. Configure here.}

[micaelae]

@metamaskbot publish-preview