feat: Only retry media uploads if a network connection is available

Retrying media uploads without a network connection will undoubtedly fail again.

Co-authored-by: Antonis Lilis <[email protected]>

libs/editor/src/main/java/org/wordpress/android/editor/gutenberg/GutenbergEditorFragment.java

@@ -1583,7 +1583,7 @@ public void onGutenbergDialogNegativeClicked(@NonNull String instanceTag) {
     @Override
     public void onConnectionStatusChange(boolean isConnected) {
         getGutenbergContainerFragment().onConnectionStatusChange(isConnected);
-        if (BuildConfig.DEBUG && hasFailedMediaUploads()) {
+        if (BuildConfig.DEBUG && isConnected && hasFailedMediaUploads()) {
             mEditorFragmentListener.onMediaRetryAll(mFailedMediaIds);
         }
     }