Fix for code scanning alert "Improper verification of intent by broadcast receiver"

https://github.com/binarynoise/CaptivePortalAutoLogin/security/code-scanning/1

Author: binarynoise

app/src/main/kotlin/de/binarynoise/captiveportalautologin/BootCompletedReceiver.kt

@@ -1,14 +1,16 @@
 package de.binarynoise.captiveportalautologin
 
-import android.annotation.SuppressLint
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import de.binarynoise.logger.Logger.log
 
 class BootCompletedReceiver : BroadcastReceiver() {
-    @SuppressLint("UnsafeProtectedBroadcastReceiver")
     override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action != Intent.ACTION_BOOT_COMPLETED) {
+            log("BootCompletedReceiver received unexpected intent: $intent")
+            return
+        }
         log("onReceive $intent")
         ConnectivityChangeListenerService.start(true)
     }