jailed media processes can dump code coverage data

use @include to bring in the minijail policy information needed so that
we can write out code coverage information on such builds;  the included
code coverage policy files is appropriate full/empty based on code
coverage flags.

Bug: 139313557
Test: 'kill -37' on processes in a code-coverage-enabled build
Test: 'kill -37' on processes in a NON code-coverage-enabled build
Change-Id: I9d5880343347ddc586e50f9eafb65e1ff7ba3748