Bluetooth: Enable AAC VBR by default

AAC VBR is more preferred than CBR for A2DP playback.

Bug: 192203000
Test: dumpsys bluetooth_manager
Change-Id: I8f758c102164da9936de7ddc0bb46e0a99279359
diff --git a/device-whitefin.mk b/device-whitefin.mk
index a583358..17e4d45 100644
--- a/device-whitefin.mk
+++ b/device-whitefin.mk
@@ -51,6 +51,9 @@
 PRODUCT_PROPERTY_OVERRIDES += \
     ro.bluetooth.a2dp_offload.supported=false
 
+PRODUCT_PRODUCT_PROPERTIES += \
+    persist.bluetooth.a2dp_aac.vbr_supported=true
+
 # NFC
 PRODUCT_COPY_FILES += \
 	device/google/gs101/nfc/libnfc-hal-st.conf:$(TARGET_COPY_OUT_VENDOR)/etc/libnfc-hal-st.conf