Make newly created CT directories executable

Directories treat the executable bit differently than files, and need it
to be set in order for the files within said directories to be
accessible. Without making the CT directories executable, the log list
file is not accessible. See
https://www.redhat.com/en/blog/linux-file-permissions-explained for more
details.

Test: atest NetworkSecurityUnitTests (also manually)
Bug: 319829948
Change-Id: I03c172e93dc3ecb50f69297ea47b2fdeb860048b
1 file changed