Android overhaul: stale comments and the module README

* Milestone and ownership notes that no longer hold ("owned by M5/M6/M8", "M8 replaces it", "(M8b)", "M7x add",
  "proposed decision in the M5 report", which is D-027 and D-028) in build scripts, :core:design, :core:fakes, :data,
  :app, :core:model and the settings string files.
* SyncEngine: the clock_skew KDoc sat orphaned above restampAfterClockSkew's; it now documents renewMutationId.
* libs.versions.toml header: no milestone, the drift date.
* README: the module table as built (no owners, no DebugFakesModule, which M8 removed), the test fixtures in the
  architecture check and the shared screenshot harness.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/core/model/src/main/kotlin/se/hagstedt/kvitt/model/analytics/Analytics.kt

@@ -2,7 +2,7 @@ package se.hagstedt.kvitt.model.analytics
 
 import kotlinx.datetime.LocalDate
 
-// Analytics input and output types (SPEC §14.5.4), package per the orchestrator's M2b decision.
+// Analytics input and output types (SPEC §14.5.4), package se.hagstedt.kvitt.model.analytics (D-017).
 
 data class AnalyticsExpense(val date: LocalDate, val accountId: String, val categoryId: String, val amountOre: Long, val shares: Map<String, Long>)