Replace stream state primitive arrays with SparseArrays

This is necessary since after the internal removal of
STREAM_BLUETOOTH_SCO we now do not have values assigner for the
primitive array index belonging to sco. Using SparseArrays offers better
null pointer and invalid index handling.

Flag: com.android.media.audio.replace_stream_bt_sco
Test: atest AudioManagerTest/AudioDeviceVolumeManagerTest/VolumeHelperTest and manual tests
Bug: 345024266
Change-Id: I3d24485fb6285025f403976ba5b9d8cf9338edfb