Fixes presubmit test flaky in dumpstate

The test assert that file size of primary.prof in the
`FS/data/misc/profiles/cur/0/com.android.phone/` should
be greater than 0. This behavior depends on art module,
and it's not always true. Updates the test to assert
the file should exist.

Bug: 178561542
Test: atest dumpstate_smoke_test
Change-Id: I1038c6c10c320cd98fa97f0890fff7f64e29e731