Rename the ca certs locator to use a more general name

The ca certs locator is not specific to atest, and can be used by any other project that uses httplib2 and python embedded launcher.

Test: atest ca_certs_locater_unittest
Bug: 337078327
Change-Id: Ie92f6884f54d4ea2a2587baf939f7e899eff7f86
1 file changed