Allow for server-side configuration of libstagefright

Relaxation of SELinux policies to allow users of libstagefright and
MediaCodec to be able to query server-side configurable flags.

Bug: 301372559
Bug: 301250938
Test: run cts -m CtsSecurityHostTestCases
Change-Id: I72670ee42c268dd5747c2411d25959d366dd972c
Merged-In: I72670ee42c268dd5747c2411d25959d366dd972c
6 files changed