Revert "audio: Use hardcoded r_submix configuration with XML"

Revert submission 2770886-AidlAudioHalModuleConfig

Reason for revert: Breaks BluetoothInstrumentationTests on main downstream

Reverted changes: /q/submissionid:2770886-AidlAudioHalModuleConfig

Bug: 305291602
Change-Id: I7f51ab94f5d42ac052e9900ddd0cc69a33856820
1 file changed