Add Looper.prepare() to doInBackground()

Fix runtime error that was being thrown as Looper.prepare() was not called
in the async function doInBackground.

Bug: 124612105

Test: Was not able to reproduce the bug (that is make code execution flow
through the catch block).
* Reproduced by throwing IOException in the try block so that code flows
  to the catch block.
* Build and flash.
* Take interactive bugreport and change title and name of the bugreport from
  the progress bar.

Change-Id: I6a5ea594d95462e1c66bd28eb81dd5f4daa6f35e

packages/Shell/src/com/android/shell/BugreportProgressService.java

@@ -1095,6 +1095,7 @@ public class BugreportProgressService extends Service {
         new AsyncTask<Void, Void, Void>() {
             @Override
             protected Void doInBackground(Void... params) {
+                Looper.prepare();
                 zipBugreport(info);
                 sendBugreportNotification(info, takingScreenshot);
                 return null;