Work on issue #143085640: Per-process network access control

Fix some issues when apps start declaring processes, add validation
that apps don't use processes they haven't declared (if they
declared some).  Also add package dump output for the processes it
has declared.

Bug: 143085640
Test: atest CtsAppSecurityHostTestCases:UseProcessTest
Change-Id: If1d13bf402d2b0aea06f0c2c02d5e392c774c812