Remove rolled out flag set_stream_volume_order

This flag has been rolled out in 24Q2 and can be removed.

Test: make
Bug: 409609858
Flag: EXEMPT removing com.android.media.audio.set_stream_volume_order
Change-Id: I3c1422335a6a5c06cbd3b860c24cf50f8c9de9e5
1 file changed