rm all the reverse bits from Activity Trampolining

This commit focuses on removing all logic that setups up multiple
Activities and flags to build a "Reverse Activity Trampoline".

This is Part 1 of required changes, this commit results in the app not
opening, resuming, or opening launch URLs, the behavior of the click
being tracked is still working via the invisible
NotificationOpenedReceiver Activity. This gives us a clean starting
state for the next commit where we we will add logic to the notification
open event to Activity Trampoline forward to the intended Activity.

Author: jkasten2

OneSignalSDK/onesignal/src/main/java/com/onesignal/GenerateNotificationOpenIntent.kt

@@ -51,17 +51,11 @@ class GenerateNotificationOpenIntent(
             context,
             notificationOpenedClassAndroid22AndOlder
         )
-
-        if (getIntentVisible() == null) {
-            // If we don't show a visible Activity put OneSignal's invisible click tracking
-            // Activity on it's own task so it doesn't resume an existing one once it closes.
-            intent.addFlags(
-                Intent.FLAG_ACTIVITY_NEW_TASK or
-                Intent.FLAG_ACTIVITY_MULTIPLE_TASK or
-                Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
-            )
-        }
-
+        intent.addFlags(
+            Intent.FLAG_ACTIVITY_NEW_TASK or
+            Intent.FLAG_ACTIVITY_MULTIPLE_TASK or
+            Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
+        )
         return intent
     }
 
@@ -83,31 +77,10 @@ class GenerateNotificationOpenIntent(
         oneSignalIntent: Intent,
     ): PendingIntent? {
         val flags =  PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
-        val launchIntent = getIntentVisible()
-            ?:
-            // Even though the default app open action is disabled we still need to attach OneSignal's
-            // invisible Activity to capture click event to report click counts and etc.
-            // You may be thinking why not use a BroadcastReceiver instead of an invisible
-            // Activity? This could be done in a 5.0.0 release but can't be changed now as it is
-            // unknown if the app developer will be starting there own Activity from their
-            // OSNotificationOpenedHandler and that would have side-effects.
-            return PendingIntent.getActivity(
-                context,
-                requestCode,
-                oneSignalIntent,
-                flags
-            )
-
-
-        // This setups up a "Reverse Activity Trampoline"
-        // The first Activity to launch will be oneSignalIntent, which is an invisible
-        // Activity to track the click, fire OSNotificationOpenedHandler, etc. This Activity
-        // will finish quickly and the destination Activity, launchIntent, will be shown to the user
-        // since it is the next in the back stack.
-        return PendingIntent.getActivities(
+        return PendingIntent.getActivity(
             context,
             requestCode,
-            arrayOf(launchIntent, oneSignalIntent),
+            oneSignalIntent,
             flags
         )
     }