fix: require accepted onchain broadcasts

[ovitrif]

Fixes #1211

This PR updates Android's on-chain send consumer to the final unpublished LDK rc.67 artifact and preserves the distinction between accepted, terminally rejected, and uncertain broadcast outcomes.

Description

• Uses com.synonym:ldk-node-android:0.7.0-rc.67 from Maven Local for validation of LDK Improve Wallet and LDK node business logic handling #113 atop Implement tag feature in the EditInvoiceScreen #115.
• Keeps sent activity and success UI conditional on an accepted Txid return.
• Covers rejected, not-dispatched, failed, and timed-out broadcasts without creating sent metadata or activity for non-accepted outcomes.
• Updates test fixtures for the final generated NodeException constructors.

Preview

2026-09-05-android1225-accepted.mp4

2026-09-05-android1225-rejected.mp4

QA Notes

Manual Tests

• 1. Fresh Android E2E identity → shared regtest fixture → accepted 1,000-sat send: 23a1ef7f277a777a7be6b2ab1b40c54e2e3e88f8d34e54a4d2b9ccd3a8bc3528 entered the mempool; the success UI and sent activity showed it.
• 2. Deterministic Electrum proxy rejection → 1,000-sat send: the proxy injected terminal -26 non-final for bbd23b0a9de52acb61ef55d3e1ea4f14f98a964932e93c255a8ee26756f6f191, which returned OnchainTxBroadcastRejected; success UI and a second sent activity were absent, and the mempool was unchanged. This proves Android's handling of a terminal Electrum rejection; it is not a live backend policy-rejection test.

Automated Checks

• LightningRepoTest.kt: covers accepted and non-accepted on-chain sends, including OnchainTxBroadcastNotDispatched.
• AppViewModelSendFlowTest.kt: verifies a rejected on-chain send does not present success.
• PaymentFailureReasonExtTest.kt, QuickPayRepoTest.kt, and LightningServiceTest.kt: compile against final generated rc.67 error bindings.
• just compile, just test, and just lint passed using Maven Local rc.67; Detekt reports only existing baseline findings outside this PR.
• E2E=true E2E_LOCAL_HOST=10.0.2.2 ./gradlew assembleDevDebug installed the reviewed head on a fresh Android emulator. The app was restored to the shared fixture after the rejection check.

Dependency

Blocked from merge until the unpublished com.synonym:ldk-node-android:0.7.0-rc.67 artifact from ldk-node#113, stacked on #115, is published to the repository CI can resolve. No release is included here.