add further checks for API Level

src/com/owncloud/android/datamodel/UploadsStorageManager.java

@@ -29,6 +29,7 @@ import android.database.Cursor;
 import android.net.Uri;
 import android.os.Build;
 import android.os.PersistableBundle;
+import android.support.annotation.RequiresApi;
 
 import com.owncloud.android.db.OCUpload;
 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
@@ -392,6 +393,7 @@ public class UploadsStorageManager extends Observable {
         }
     }
 
+    @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
     private List<OCUpload> getPendingJobs() {
         JobScheduler js = (JobScheduler) mContext.getSystemService(Context.JOB_SCHEDULER_SERVICE);
 
@@ -409,6 +411,7 @@ public class UploadsStorageManager extends Observable {
         return list;
     }
 
+    @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
     public void cancelPendingJob(String accountName, String remotePath){
         JobScheduler js = (JobScheduler) mContext.getSystemService(Context.JOB_SCHEDULER_SERVICE);
 

src/com/owncloud/android/files/services/FileUploader.java

@@ -33,6 +33,7 @@ import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
@@ -678,7 +679,7 @@ public class FileUploader extends Service
                 // need to update now table in mUploadsStorageManager,
                 // since the operation will not get to be run by FileUploader#uploadFile
                 mUploadsStorageManager.removeUpload(accountName, remotePath);
-            } else {
+            } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                 // try to cancel job in jobScheduler
                 mUploadsStorageManager.cancelPendingJob(accountName, remotePath);
             }