Expose permission MEDIA_RESOURCE_OVERRIDE_PID as a system API and allow

vendor services to use it

The MEDIA_RESOURCE_OVERRIDE_PID permission is needed to create codecs on
behalf of other processes. The protection level is elevated to allow for
Vendor and OEM processes, specifically for Vendor/OEM TvInputService
which manages inputs for broadcast and cable TV apps.

Bug: 217746837
Fixes: 219768766
Test: atest MediaCodecResourceTest
Change-Id: I8b2f4da91be120250f6f37c5623a8a0afe0e1c82