fix(android): add BootReceiver.kt (force-add past gitignore)

frontend/android/app/src/main/kotlin/com/teamsb/tis_rms/BootReceiver.kt

@@ -0,0 +1,18 @@
+package com.teamsb.tis_rms
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import com.pravera.flutter_foreground_task.service.ForegroundService
+
+class BootReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        val action = intent.action ?: return
+        if (action == Intent.ACTION_BOOT_COMPLETED ||
+            action == "android.intent.action.QUICKBOOT_POWERON"
+        ) {
+            val serviceIntent = Intent(context, ForegroundService::class.java)
+            context.startForegroundService(serviceIntent)
+        }
+    }
+}