tetris: sepolicy: Allow audio access power hal

   - Fixes: avc:  denied  { find } for interface=vendor.mediatek.hardware.mtkpower::IMtkPower sid=u:r:hal_audio_default:s0 pid=844 scontext=u:r:hal_audio_default:s0 tcontext=u:object_r:hal_power_hwservice:s0 tclass=hwservice_manager permissive=0