make var static again

Author: lll000111

android/src/main/java/com/RNFetchBlob/RNFetchBlob.java

@@ -37,7 +37,7 @@ public class RNFetchBlob extends ReactContextBaseJavaModule {
 
     private final OkHttpClient mClient;
 
-    ReactApplicationContext RCTContext;
+    static ReactApplicationContext RCTContext;
     private static LinkedBlockingQueue<Runnable> taskQueue = new LinkedBlockingQueue<>();
     private static ThreadPoolExecutor threadPool = new ThreadPoolExecutor(5, 10, 5000, TimeUnit.MILLISECONDS, taskQueue);
     static LinkedBlockingQueue<Runnable> fsTaskQueue = new LinkedBlockingQueue<>();
@@ -352,7 +352,7 @@ public void getContentIntent(String mime, Promise promise) {
 
     @ReactMethod
     public void addCompleteDownload (ReadableMap config, Promise promise) {
-        DownloadManager dm = (DownloadManager) RNFetchBlob.RCTContext.getSystemService(RNFetchBlob.RCTContext.DOWNLOAD_SERVICE);
+        DownloadManager dm = (DownloadManager) RCTContext.getSystemService(RCTContext.DOWNLOAD_SERVICE);
         String path = RNFetchBlobFS.normalizePath(config.getString("path"));
         if(path == null) {
             promise.reject("RNFetchblob.addCompleteDownload can not resolve URI:" + config.getString("path"), "RNFetchblob.addCompleteDownload can not resolve URI:" + path);