simpleperf: Minor code readability change

In 11017687d6, we switched ApkInspector::FindOffsetInApkByName()
to return bool.  We were a little overly aggressive switching
things to 'false', and now switch an integral comparison back
to comparing against '0' instead of 'false'.

This has no runtime change for the code, and is just for
readability.

Test: Treehugger
Change-Id: I8704ff9d99d266e18aa8a3e43fce1c519902c3b0
1 file changed