[WAL-1372] feat(wallet): add runtime proximity controls

[szijpeter]

Summary

Closed as superseded — do not merge standalone. Its complete runtime-profile delta was transplanted into WAL-1347 integration PR #2166 with transplant proof and integrated ReaderAuth-provider composition. WAL-1372 is superseded by the integration ownership.

Adds runtime proximity transport controls to the Compose wallet demo Settings screen so one installed build can switch between the existing production-default path and the two provisional NFCv2 qualification profiles.

This PR is stacked on WAL-1347 wallet integration PR #2166. The default selection preserves the existing QR/NFC negotiated engagement and conventional retrieval behavior.

What Changed

• Adds three typed, persisted profiles: default, provisional NFCv2 hybrid over BLE, and provisional NFCv2 direct over NFC.
• Exposes the profiles under a dedicated Proximity Presentation Settings section on proximity-capable mobile demos.
• Snapshots the selected profile when a session starts, so changing Settings cannot mutate an active session.
• Shares the same preference and configuration mapping across Compose Android and Compose iOS.
• Falls back safely to the default profile when an unknown persisted value is encountered.

Architecture Notes

• Settings select a constrained demo profile rather than exposing arbitrary SDK configuration.
• Platform and transport capability checks remain owned by the proximity SDK before engagement.
• The demo UI does not duplicate protocol-state or fallback decisions.

Caveats and Follow-Ups

• Both NFCv2 choices are explicitly provisional and intended for qualification work.
• The underlying direct and hybrid mappings have bounded physical evidence in WAL-1349 architecture PR #61. A physical pass through this new Settings selector remains open on WAL-1372; this PR does not broaden protocol semantics.
• The profile remains a demo-app preference and is not a new public wallet SDK API.

Breaking

None. The default behavior is unchanged.

Refs WAL-1372

[linear-code]

WAL-1372

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[szijpeter]

Superseded by #2166 at 060a028569b3be26bf9b7ec0bace5025f00e1bbc. Both donor commits were absorbed (d37aa47a8→d673fe6cc, 445ede325→5767e0726); the range-diff differences are the intentional composition with #2160 ReaderAuth settings so transport and trust are snapshotted together. Compose host tests and the focused native suite pass on the consolidated head. Closing without merge.