52723ecd91
While tests are hopefully cleaning up after themselves,
there is no guarantee that there is a currently available
default network milliseconds after any given test. Some
tests need to disconnect to check something, or to change
a property of the wifi network that they have to revert at
the end for example. Or, a test may fail leaving the device
without a default network.
To make sure the state is correctly cleaned up, have
tearDown make sure the device is connected to a working
Internet connection before the test ends, so that the next
test can be sure to find established connectivity
immediately. It's possible the device needs a few hundred
milliseconds to re-establish connectivity, so this patch
gives a grace of up to 30 seconds (the default waiting
timer for TestCallback) for connectivity to be restored at
the end of any test.
Bug: 161767594 and others
Test: ConnectivityManagerTest
Original change: https://android-review.googlesource.com/c/platform/cts/+/1436794
Change-Id: I2318a6d1a6d6ac4b142fc998f0c5efbe93b68707
(cherry picked from commit ff47147c3a)