Move IAM cache cleaning to OSInAppMessageController

* IAM database access and all regarding IAM should live in OSInAppMessageController

Author: Jeasmine

OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessageController.java

@@ -26,6 +26,7 @@
 class OSInAppMessageController implements OSDynamicTriggerControllerObserver, OSSystemConditionController.OSSystemConditionObserver {
 
     private static final Object LOCK = new Object();
+    private final static String OS_DELETE_CACHED_REDISPLAYED_IAMS_THREAD = "OS_DELETE_CACHED_REDISPLAYED_IAMS_THREAD";
     private static final String OS_SAVE_IN_APP_MESSAGE = "OS_SAVE_IN_APP_MESSAGE";
     public static final String IN_APP_MESSAGES_JSON_KEY = "in_app_messages";
     private static ArrayList<String> PREFERRED_VARIANT_ORDER = new ArrayList<String>() {{
@@ -826,6 +827,23 @@ void onSuccess(String response) {
         }, null);
     }
 
+    /**
+     * Remove IAMs that the last display time was six month ago
+     * 1. Query for all old message ids and old clicked click ids
+     * 2. Delete old IAMs from SQL
+     * 3. Use queried data to clean SharedPreferences
+     */
+    void cleanCachedInAppMessages() {
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                Thread.currentThread().setPriority(Process.THREAD_PRIORITY_BACKGROUND);
+
+                inAppMessageRepository.cleanCachedInAppMessages();
+            }
+        }, OS_DELETE_CACHED_REDISPLAYED_IAMS_THREAD).start();
+    }
+
     /**
      * Part of redisplay logic
      * <p>

OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessageRepository.java

@@ -147,7 +147,6 @@ synchronized void cleanCachedInAppMessages() {
      * Note: This should only ever be called by {@link OSInAppMessageRepository#cleanCachedInAppMessages()}
      * <br/><br/>
      *
-     * @see OneSignalCacheCleaner#cleanCachedInAppMessages(OneSignalDbHelper)
      * @see OSInAppMessageRepository#cleanCachedInAppMessages()
      */
     private void cleanInAppMessageIds(Set<String> oldMessageIds) {
@@ -187,7 +186,6 @@ private void cleanInAppMessageIds(Set<String> oldMessageIds) {
      * Note: This should only ever be called by {@link OSInAppMessageRepository#cleanCachedInAppMessages()}
      * <br/><br/>
      *
-     * @see OneSignalCacheCleaner#cleanCachedInAppMessages(OneSignalDbHelper)
      * @see OSInAppMessageRepository#cleanCachedInAppMessages()
      */
     private void cleanInAppMessageClickedClickIds(Set<String> oldClickedClickIds) {