Hook into OSPopupWindow to know of dismissal

In InAppMessageView which owns the popup window, it will listen to the popup window's dismissal event and trigger the post-dismissal flow.
It also sets the manual flag when `removeAllViews()` is invoked.

Author: nan-li

OneSignalSDK/onesignal/in-app-messages/src/main/java/com/onesignal/inAppMessages/internal/display/impl/InAppMessageView.kt

@@ -85,6 +85,16 @@ internal class InAppMessageView(
     private var isDismissTimerSet: Boolean = false
     private var cancelDismissTimer: Boolean = false
 
+    private val popupWindowListener =
+        object : OSPopupWindow.PopupWindowListener {
+            override fun onDismiss(wasDismissedManually: Boolean?) {
+                if (wasDismissedManually != true) {
+                    Logging.debug("PopupWindowListener.onDismiss called by the system.")
+                    messageController?.onMessageWasDismissed()
+                }
+            }
+        }
+
     init {
         setMarginsFromContent(messageContent)
     }
@@ -275,6 +285,7 @@ internal class InAppMessageView(
                 if (hasBackground) WindowManager.LayoutParams.MATCH_PARENT else pageWidth,
                 if (hasBackground) WindowManager.LayoutParams.MATCH_PARENT else WindowManager.LayoutParams.WRAP_CONTENT,
                 false,
+                popupWindowListener
             )
         popupWindow?.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
         popupWindow?.isTouchable = true
@@ -301,6 +312,7 @@ internal class InAppMessageView(
             popupWindow!!,
             displayType,
         )
+
         popupWindow?.showAtLocation(
             currentActivity!!.window.decorView.rootView,
             gravity,
@@ -485,17 +497,14 @@ internal class InAppMessageView(
      */
     fun removeAllViews() {
         Logging.debug("InAppMessageView.removeAllViews()")
+        popupWindow?.wasDismissedManually = true
         if (isDismissTimerSet) {
             // Dismissed before the dismiss delay
             cancelDismissTimer = true
         }
-        if (draggableRelativeLayout != null) {
-            draggableRelativeLayout!!.removeAllViews()
-        }
 
-        if (popupWindow != null) {
-            popupWindow!!.dismiss()
-        }
+        draggableRelativeLayout?.removeAllViews()
+        popupWindow?.dismiss()
 
         dereferenceViews()
     }