Fix possible zombie thread for DecodeAccuracyTest

The junit framework cannot interrupt main thread from waiting for
SurfaceView snapshot, thus test doesn't fail at the test level timeout,
and runs til the CTS framework times out.

Bug: 73011430
Test: tested locally on walleye
Change-Id: I9cec966bcb10033e5b752341bca5467133976848
1 file changed