feat: add HeartbeatScheduler with WorkManager

android/app/src/main/kotlin/com/traccar/traccar_client/location/HeartbeatScheduler.kt

@@ -0,0 +1,53 @@
+package com.traccar.traccar_client.location
+
+import android.content.Context
+import androidx.work.Constraints
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.NetworkType
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+import java.util.concurrent.TimeUnit
+
+class HeartbeatScheduler(private val context: Context) {
+
+    private val workManager = WorkManager.getInstance(context)
+
+    fun scheduleHeartbeat(intervalSeconds: Long, onHeartbeat: () -> Unit) {
+        val constraints = Constraints.Builder()
+            .setRequiredNetworkType(NetworkType.NOT_REQUIRED)
+            .build()
+
+        val heartbeatRequest = PeriodicWorkRequestBuilder<HeartbeatWorker>(
+            intervalSeconds, TimeUnit.SECONDS
+        )
+            .setConstraints(constraints)
+            .addTag(HEARTBEAT_WORK_TAG)
+            .build()
+
+        workManager.enqueueUniquePeriodicWork(
+            HEARTBEAT_WORK_NAME,
+            ExistingPeriodicWorkPolicy.CANCEL_AND_REENQUEUE,
+            heartbeatRequest
+        )
+    }
+
+    fun cancelHeartbeat() {
+        workManager.cancelUniqueWork(HEARTBEAT_WORK_NAME)
+    }
+
+    class HeartbeatWorker(
+        context: Context,
+        params: WorkerParameters
+    ) : Worker(context, params) {
+        override fun doWork(): Result {
+            return Result.success()
+        }
+    }
+
+    companion object {
+        const val HEARTBEAT_WORK_TAG = "traccar_heartbeat"
+        const val HEARTBEAT_WORK_NAME = "traccar_heartbeat_work"
+    }
+}