Fix multiuser CTS tests

cts/hostsidetests/multiuser relies on parsing log to detect
app crashes. In [1], we removes the log for refactoring,
which leads to the detecting mechanism in multiuser CTS no more
working.

This CL adds the log it back.

Test: atest cts/hostsidetests/multiuser
fixes: 217452444
Change-Id: I24a1c94a35a627e5bd02b4321db24eb79c12c7da
1 file changed