Properly tear down streams in OutColdStart and InColdStart tests.

Bug: 198831905
Test: Build, install, run tests...
Change-Id: I4657e7241141401edf680280576ad93157a5339a
Merged-In: I4657e7241141401edf680280576ad93157a5339a
(cherry picked from commit 73976c628887535b652c700ddbdd692d4b17638f)
2 files changed