Remove setOngoing to allow dismissing from lock screen.

This reverts part of f5fbdfe whose
motivation I (mis?)remembered as being paranoia about pocket actions,
but more likely was that a dismissed notification might have left the
alarm sound playing indefinitely until the same commit stopped
playback on dismiss (via setDeleteIntent).

Also mildly restructure the "is interesting notification" check since
I got tired of mis-parsing it visually (and added debug as a pre-req
for gmail, as an extra safety guard).

app/src/main/java/org/fischman/alarmingnotifications/NotificationListener.kt

@@ -33,14 +33,12 @@ class NotificationListener : NotificationListenerService() {
         @Suppress("DEPRECATION")
         mp.setAudioStreamType(AudioManager.STREAM_ALARM)
         mp.isLooping = true
-
     }
+
     override fun onNotificationPosted(sbn: StatusBarNotification) {
-        if (// sbn.packageName != "com.google.android.gm" && // Debug using Gmail chat notifications.
-            sbn.packageName != "com.google.android.calendar"
-        ) {
-            return
-        }
+        val interesting = // (debug && sbn.packageName == "com.google.android.gm") || // Debug using Gmail chat notifications.
+                sbn.packageName == "com.google.android.calendar"
+        if (!interesting) { return }
 
         // Other places that text can be stored in in Notifications. Possibly of future interest for apps other than GCal and GMail.
         if (0 > 1) {
@@ -114,7 +112,6 @@ class NotificationListener : NotificationListenerService() {
                 .setContentTitle(label)
                 .setContentText("")
                 .setCategory(Notification.CATEGORY_CALL)
-                .setOngoing(true)
                 .setFlag(Notification.FLAG_NO_CLEAR, true)
                 .setDeleteIntent(stopIntent)
                 .addAction(