Avoid some lint warnings

app/src/main/kotlin/com/tutpro/baresip/AccountActivity.kt

@@ -56,7 +56,7 @@ class AccountActivity : AppCompatActivity() {
     private var save = false
     private var uaIndex= -1
 
-    val scope = CoroutineScope(Job() + Dispatchers.Main)
+    private val scope = CoroutineScope(Job() + Dispatchers.Main)
 
     override fun onCreate(savedInstanceState: Bundle?) {
 

app/src/main/kotlin/com/tutpro/baresip/Api.kt

@@ -6,7 +6,7 @@ object Api {
     const val AF_INET = 2
     const val AF_INET6 = 10
     const val VIDMODE_OFF = 0
-    const val VIDMODE_ON = 1
+    // const val VIDMODE_ON = 1
     const val ANSWERMODE_MANUAL = 0
     const val ANSWERMODE_AUTO = 2
     const val DTMFMODE_RTP_EVENT = 0

app/src/main/kotlin/com/tutpro/baresip/BootCompletedReceiver.kt

@@ -1,5 +1,6 @@
 package com.tutpro.baresip
 
+import android.annotation.SuppressLint
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.app.PendingIntent
@@ -17,6 +18,7 @@ class BootCompletedReceiver : BroadcastReceiver() {
 
     private val START_NOTIFICATION_IN = 105
 
+    @SuppressLint("UnspecifiedImmutableFlag")
     override fun onReceive(context: Context, intent: Intent) {
 
         Log.i(TAG, "BootCompletedReceiver received intent ${intent.action}")
@@ -43,7 +45,11 @@ class BootCompletedReceiver : BroadcastReceiver() {
                 val channel = NotificationChannel("default", "default",
                         NotificationManager.IMPORTANCE_DEFAULT)
                 nm.createNotificationChannel(channel)
-                val pi = PendingIntent.getActivity(context, 0, i, PendingIntent.FLAG_ONE_SHOT)
+                val pi = if (Build.VERSION.SDK_INT >= 23)
+                    PendingIntent.getActivity(context, 0, i,
+                        PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_ONE_SHOT)
+                else
+                    PendingIntent.getActivity(context, 0, i, PendingIntent.FLAG_ONE_SHOT)
                 with(NotificationCompat.Builder(context, "default")) {
                     setSmallIcon(R.drawable.ic_stat)
                     setContentTitle(context.getString(R.string.app_name))

app/src/main/kotlin/com/tutpro/baresip/CallHistory.kt

@@ -31,7 +31,7 @@ class CallHistory(val aor: String, val peerUri: String, val direction: String,
             while (it.hasNext()) if (it.next().aor == aor) it.remove()
         }
 
-        fun aorHistorySize(aor: String): Int {
+        private fun aorHistorySize(aor: String): Int {
             return BaresipService.callHistory.filter { it.aor == aor }.count()
         }