Convert PRODUCT_COPY_FILES to Android.bp for files under framework/av

Flag: EXEMPT bugfix
Bug: 407479698
Test: m aosp_audio_policy_volumes.xml aosp_audio_effects.xml
Test: m aosp_default_volume_tables.xml aosp_r_submix_audio_policy_configuration.xml
Test: m aosp_surround_sound_configuration_5_0.xml aosp_usb_audio_policy_configuration.xml
Change-Id: I02bad21cb93409d949603ad9309f2b392f90a8a2
3 files changed