only setting notification channel for supported android versions

features/notifications/src/main/kotlin/app/dapk/st/notifications/NotificationChannels.kt

@@ -2,6 +2,7 @@ package app.dapk.st.notifications
 
 import android.app.NotificationChannel
 import android.app.NotificationManager
+import android.os.Build
 
 private const val channelId = "message"
 
@@ -10,14 +11,16 @@ class NotificationChannels(
 ) {
 
     fun initChannels() {
-        if (notificationManager.getNotificationChannel(channelId) == null) {
-            notificationManager.createNotificationChannel(
-                NotificationChannel(
-                    channelId,
-                    "messages",
-                    NotificationManager.IMPORTANCE_HIGH,
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            if (notificationManager.getNotificationChannel(channelId) == null) {
+                notificationManager.createNotificationChannel(
+                    NotificationChannel(
+                        channelId,
+                        "messages",
+                        NotificationManager.IMPORTANCE_HIGH,
+                    )
                 )
-            )
+            }
         }
     }