Extract swap app allowance into helper

[iamacook]

Summary

Swap decoded is restricted to certain allowed apps. Now that we are decoding swap orders/transfers and TWAP orders, this check occurs in several places. There are dedicated isAppAllowed methods for both swap and TWAPs.

This extracts the multiple methods in a new SwapApps helper, calling it in every places instead.

Changes

• Create and import SwapAppsHelper
• Replace all calls to isAppAllowed with that from the above helper
• Add/update tests accordingly

[coveralls]

Pull Request Test Coverage Report for Build 9877926707

Details

• 19 of 31 (61.29%) changed or added relevant lines in 8 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.09%) to 48.279%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/routes/transactions/mappers/common/swap-order.mapper.ts	2	3	66.67%
src/routes/transactions/mappers/transfers/swap-transfer-info.mapper.ts	2	3	66.67%
src/routes/transactions/mappers/common/twap-order.mapper.ts	2	5	40.0%
src/routes/transactions/transactions-view.service.ts	1	4	25.0%
src/routes/transactions/helpers/swap-apps.helper.ts	9	13	69.23%

Totals
Change from base Build 9877650171:	0.09%
Covered Lines:	4258
Relevant Lines:	7090

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💛 - Coveralls

[hectorgomezv]

LGTM 👏🏻 But I think a rebase is needed to solve the conflicts.