avoid duplicate of mediaswcodec seccomp policy files

Remove superfluous Android.bp clauses

Bug: 160125811
Test: check generated files, boot to verify use of proper files
Change-Id: I7f4e88553ae3b014a00adbfd796e72b43d31ee61
(cherry picked from commit dc1cfaeb847682de0a06c9eb7a6781000b57cc63)
1 file changed