config: Add fm a2dp concurrency property

- FM over a2dp is not supported
- Add system property to disable concurrency

Change-Id: Iffff549af113662201ff4063a53ccc445bae234a
diff --git a/configs/msmcobalt/msmcobalt.mk b/configs/msmcobalt/msmcobalt.mk
index b7684ed..12a922c 100644
--- a/configs/msmcobalt/msmcobalt.mk
+++ b/configs/msmcobalt/msmcobalt.mk
@@ -211,3 +211,6 @@
 PRODUCT_PROPERTY_OVERRIDES += \
 qcom.hw.aac.encoder=true
 
+#Disable FM a2dp concurrency
+PRODUCT_PROPERTY_OVERRIDES += \
+fm.a2dp.conc.disabled=true