Adding FileSystemUtils test

Adding tests to check whether apps can be launched after
loading the punched libs. One app has uncompressed shared lib which
will be directly loaded from apk and other will extract it.

Test: acloud delete --all && m && acloud create --local-instance --local-image && adb logcat -c && m FileSystemUtilsTests && atest -c FileSystemUtilsTests
Bug: 301631861
Change-Id: I4f7b38902f2e02e83a350cd1cc907f8edaa20c81
11 files changed