Add audio permission check to list audio product strategies

Also moved legacy audio stream conversion methods outside of the
permission check since they are used in various non-permission
guarded use cases (i.e. audio attribute legacy stream conversions)

Bug: 316643994
Test: atest AudioManagerTest
Flag: android.media.audiopolicy.multi_zone_audio
Change-Id: Idb7b7d2b4fc2287604d85fb2176fb5063d89b4d0