Fix for unreliable createNewFile function

At one point, this was necessary(?). It appears to be problematic and the root cause of an unnecessary FileNotFoundException. Apache's FileUtils will create the directory and file, if necessary, when using version 1.3+ of the io library. This avoids maintaining workarounds.

shell/android-studio/app/src/main/java/com/reicast/emulator/FileBrowser.java

@@ -208,18 +208,17 @@ public class FileBrowser extends Fragment {
 					in.close();
 					out.close();
 				} else if (!file.exists()) {
-					file.getParentFile().mkdirs();
-					file.createNewFile();
-					OutputStream fo = new FileOutputStream(file);
+					org.apache.commons.io.FileUtils.touch(file);
 					InputStream png = getActivity().getAssets().open("buttons.png");
-
+					OutputStream fo = new FileOutputStream(file);
 					byte[] buffer = new byte[4096];
-					int len = 0;
-					while ((len = png.read(buffer)) != -1) {
-						fo.write(buffer, 0, len);
+					int read;
+					while ((read = png.read(buffer)) != -1) {
+						fo.write(buffer, 0, read);
 					}
-					fo.close();
 					png.close();
+					fo.flush();
+					fo.close();
 				}
 			} catch (FileNotFoundException fnf) {
 				fnf.printStackTrace();