feat(android): PlayEventsReporter — wire mobile plays to server

Observes PlayerController.uiState and runs the (current track,
playing) state machine. Fires play_started on track-begin, then
on close emits play_ended (within 3s of duration) or play_skipped
through the live EventsApi. Failures and offline-start plays fall
through to the MutationQueue PLAY_OFFLINE kind for durable replay.
App-background (ProcessLifecycleOwner onStop) closes the current
play via the offline path so a process kill mid-listen still
records a play.

Wires into MinstrelApplication via @Inject so the singleton
constructs at app start (same pattern as MutationReplayer /
SyncController / ResumeController). client_id is a stable
device-install UUID resolved through AuthStore (added in 415200d).

Adds androidx.lifecycle:lifecycle-process dependency for the
ProcessLifecycleOwner background-event hook.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/app/build.gradle.kts

@@ -119,6 +119,7 @@ dependencies {
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.lifecycle.runtime.compose)
     implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.lifecycle.process)
     implementation(libs.androidx.activity.compose)
     implementation(libs.androidx.nav.compose)
     implementation(libs.androidx.hilt.nav.compose)