fix: clear Play Console NFC scheme warning

[jvsena42]

This PR removes the BROWSABLE category from the NFC NDEF_DISCOVERED intent filter to clear the Google Play Console Deep Links warning "Add an ACTION_VIEW intent action attribute to the intent filter" that was raised against BITCOIN:// and nearly all other custom schemes.

Description

The custom schemes (bitcoin, bitkit, lightning, lnurl*, etc.) are declared twice: once in the deep-link filter that already has ACTION_VIEW, and once in the NFC filter that uses NDEF_DISCOVERED. Because the NFC filter also carried BROWSABLE, Play's link crawler treated those schemes as browsable deep links missing an ACTION_VIEW action and flagged them.

NFC tag dispatch matches on the action and data only and does not need BROWSABLE, so dropping that category clears the false warning while keeping the gift-card-tap flow intact (gift cards encode bitkit://gift-<code>-<amount>, which the NFC filter still matches via its bitkit scheme). The deep-link ACTION_VIEW filter and the autoVerify App Links filter are unchanged.

This addresses only the custom-scheme warning. The separate "domain failed validation" error for https://www.bitkit.to/treasure-hunt is a server-side Digital Asset Links issue (the live assetlinks.json lists the wrong package) and is tracked in synonymdev/synonym-website#245.

Preview

QA Notes

Manual Tests

• 1. regression: Tap an NFC gift card → Gift sheet opens and the claim proceeds as before.
• 2. regression: Open a custom-scheme link (bitcoin: / lightning: / lnurl / bitkit://) from another app → Bitkit opens and routes to the correct flow.

Automated Checks

• N/A — manifest-only change with no automated coverage added or changed. just compile and detekt pass locally; standard compile/unit/detekt checks run by the PR bot.