commit f5a7c1647b86a50c8f87f8d8ee88e311fc38aa44
author markchien <markchien@google.com> Thu Feb 06 14:34:08 2020 +0800
committer markchien <markchien@google.com> Thu Feb 06 17:18:39 2020 +0800
tree 9dceb031a5eed4e03903edd82ac0ccec42762997
parent 283abc0ad4b1131143c4c25d4dcf63c31b6ed765

Always report non-null TetherStatesParcel

Before this change, tetherStatesParcel may be null when there is no
avaialbe tethering interface yet. TetheringManager should handle null
case. But it is annoy to check null case each time and easy to have error.
Report non-null empty TetherStatesParcel object instead.

Bug: 148874619
Test: -build, flash, boot
      -atest TetheringTests
      -OFF/ON hotspot

Change-Id: I0717e7958c9409648170498d5e76322207856de3