Refactor from NotNull to NonNull

Author: Jeasmine

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

@@ -14,7 +14,6 @@
 
 import com.google.common.util.concurrent.ListenableFuture;
 
-import org.jetbrains.annotations.NotNull;
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -107,7 +106,7 @@ public Object attachCompleter(@NonNull CallbackToFutureAdapter.Completer<Result>
             });
         }
 
-        private String doWork(@NotNull CallbackToFutureAdapter.Completer<Result> completer) {
+        private String doWork(@NonNull CallbackToFutureAdapter.Completer<Result> completer) {
             Data inputData = getInputData();
             try {
                 OneSignal.onesignalLog(OneSignal.LOG_LEVEL.DEBUG, "NotificationWorker running doWork with data: " + inputData);

OneSignalSDK/unittest/src/test/java/com/onesignal/MockDelayTaskController.java

@@ -1,6 +1,6 @@
 package com.onesignal;
 
-import org.jetbrains.annotations.NotNull;
+import androidx.annotation.NonNull;
 
 public class MockDelayTaskController extends OSDelayTaskController {
     private int mockedRandomValue = 0;
@@ -10,11 +10,11 @@ public MockDelayTaskController(OSLogger logger) {
         super(logger);
     }
 
-    protected int getRandomNumber() {
+    protected int getRandomDelay() {
         return mockedRandomValue;
     }
 
-    public void delayTaskByRandom(@NotNull Runnable runnable) {
+    public void delayTaskByRandom(@NonNull Runnable runnable) {
         if (runOnSameThread) {
             runnable.run();
         } else {