tree 34d80cb7d77872cd44c54b7c34e0b00251029470
parent f0541557979a429f93e2c4d057a76c79dac319d3
author JW Wang <wangchun@google.com> 1611926705 +0800
committer JW Wang <wangchun@google.com> 1612154421 +0800

Register and unregister might be out of order (5/n)

Calling unregisterHealthObserver() right after startObservingHealth()
will fail to unregister observers correctly because startObservingHealth()
do registration asynchronously.

Let's do unregistration asynchronously as well to keep things in order.

Bug: 178675924
Test: atest PackageWatchdogTest
Change-Id: I7dfea957fb88f0346cdeea20e626a728ec1a1325