Remove permission check on some codec methods

getCodecStatus and setCodecConfigPreference are needed by
a partner to maintain backwrds compatibility. We can't
change the API now, so removing the privoleged permission
check.

Tag: #feature
Test: manual testing on app
Bug: 170678351
Ignore-AOSP-First: cherry-pick to tm-dev
Change-Id: Icee0128cf6088ab2ff343e458e49015e899ee0c5