[Detail]
Add sepolicy for mediacodec since SW decoder would control CPU freq and will need to getattr proc_thermal
MTK-Commit-Id: 5ce3aa68771bdb3af46a43b1c3455d365256c99c
Change-Id: I4ca98c4ae7b06e616e19f582190826beec490a04
CR-Id: ALPS03852480
Feature: VP9 Decoder
(cherry picked from commit f173ea13c62696f30465a4cb23061e1512c0ae1f)