sm7125: Build libbluetooth_audio_session from source

The older VNDK 30 blob when linked against the newer default bluetooth
HW module, had a missing symbol:
`_ZN7android9bluetooth5audio25BluetoothAudioSession_2_132invalidOffloadAudioConfigurationE`

Since we build default bluetooth HW module from source, build
libbluetooth_audio_session from source as well.

Fixes: Bluetooth Audio on Android 12
Signed-off-by: Vaisakh Murali <mvaisakh@statixos.com>
Change-Id: I13c09ecc37f709c575103d108acf5ca1b5aa2553

proprietary-files.txt

@@ -118,9 +118,7 @@ vendor/firmware/dax_param.bin
 vendor/bin/hw/android.hardware.bluetooth@1.0-service-qti
 vendor/lib/hw/audio.bluetooth_qti.default.so
 vendor/lib64/hw/audio.bluetooth_qti.default.so
-vendor/lib/libbluetooth_audio_session.so
 vendor/lib/libbluetooth_audio_session_qti.so
-vendor/lib64/libbluetooth_audio_session.so
 vendor/lib64/libbluetooth_audio_session_qti.so
 vendor/lib/vendor.samsung.hardware.bluetooth.a2dp@1.0.so
 vendor/lib/vendor.qti.hardware.bluetooth_sar@1.1.so