Do not buzzing for each progress of bugreport notification

Only alert bugreport notification at the begining and end.

Bug: 146135200
Test: Manually changing the notification settings to default
      from silent.
Change-Id: Ie955266ad8a7a27a9dc74743e276b5e9c7a2d6fb

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

@@ -1245,6 +1245,7 @@ public class BugreportProgressService extends Service {
                 .setContentText(content)
                 .setContentIntent(PendingIntent.getService(mContext, info.id, shareIntent,
                         PendingIntent.FLAG_UPDATE_CURRENT))
+                .setOnlyAlertOnce(false)
                 .setDeleteIntent(newCancelIntent(mContext, info));
 
         if (!TextUtils.isEmpty(info.getName())) {
@@ -1284,6 +1285,7 @@ public class BugreportProgressService extends Service {
                 .setLocalOnly(true)
                 .setColor(context.getColor(
                         com.android.internal.R.color.system_notification_accent_color))
+                .setOnlyAlertOnce(true)
                 .extend(new Notification.TvExtender());
     }