Fix issue 64 and 65 for nougat

app/src/main/java/foundation/e/drive/services/OperationManagerService.java

@@ -130,7 +130,7 @@ public class OperationManagerService extends Service implements OnRemoteOperatio
      */
     private synchronized void startWork( int threadIndex ){
         Log.i(TAG, "startWork("+threadIndex+")" );
-        if( !mThreadWorkingState[threadIndex] || CommonUtils.haveNetworkConnexion( getApplicationContext() ) ) { //check if the thread corresponding to threadIndex isn't already working
+        if( !mThreadWorkingState[threadIndex] && CommonUtils.haveNetworkConnexion( getApplicationContext() ) ) { //check if the thread corresponding to threadIndex isn't already working
 
             ComparableOperation operation = this.mOperationsQueue.poll(); //return null if deque is empty
             if (operation != null) {
@@ -152,18 +152,6 @@ public class OperationManagerService extends Service implements OnRemoteOperatio
         } //else : thread is already running or no network connexion
     }
 
-    /**
-     * Tell if there is at least one thread which can get new task to do
-     * @return boolean true if there is a free thread place else return false
-     */
-    private boolean isThereAFreeThread(){
-        for(int i =-1; ++i < workerAmount;){
-            if( !mThreadWorkingState[i] )
-                return true;
-        }
-        return false;
-    }
-
     @Nullable
     @Override
     public IBinder onBind(Intent intent) {
@@ -326,7 +314,7 @@ public class OperationManagerService extends Service implements OnRemoteOperatio
         }
         mOperationsQueue.add(operation);
         Log.d(TAG, "OperationQueue: "+mOperationsQueue.size());
-        if( isThereAFreeThread() ) startAllThreads();
+        startAllThreads();
     }
 
     /**