suspend: De-flake suspend tests

The events that happen on the sock stream can race with the isBlocked() checks because the autosuspend loop is a separate thread from the test thread. Add some buffer time to avoid flakiness in these tests.

Test: Treehugger
Bug: 255898234
Bug: 265513788
Bug: 266077359
Change-Id: Ie03b343e46dc4035c09cb0a5399b4a5da569f7d4
Merged-In: Ie03b343e46dc4035c09cb0a5399b4a5da569f7d4
1 file changed