odrefresh: Allow extra 30s for subprocesses in VM

The test is still flaky (9.2% on aosp-master, cuttlefish on GCE) due to
the timeout. Give it extra time to see if it helps.

Bug: 197275229
Test: TH
Change-Id: I850cc14103599a0a6c141834d1deb166f0cee597
1 file changed