Fix test testZenUpgradeNotification on watch

Commit a485ec65b5ba947d69158ad90905abf3310655cf disabled DND status
change notification on watch. So, assume that the device is not watch
to make the test pass.

Bug: 266833455
Test: atest FrameworksUiServicesTests:com.android.server.\
  notification.ZenModeHelperTest#testZenUpgradeNotification
Change-Id: I94441c7172e55ed20add72b4558407fcc1a11fe6
(cherry picked from commit 6aa3b73ea5422cd057e3d58a61a3a013fd5b7f19)
1 file changed