Add bluetooth libraries to mainline_system.

These are included on current mainline devices.

Bug: 80410283
Test: lunch mainline_arm64; m nothing
Change-Id: I1c214c760f3f668804baef642f1c7121d0723bfb
diff --git a/target/product/mainline_system.mk b/target/product/mainline_system.mk
index 4b72749..0a2d149 100644
--- a/target/product/mainline_system.mk
+++ b/target/product/mainline_system.mk
@@ -32,6 +32,11 @@
     cppreopts.sh \
     otapreopt_script \
 
+# Bluetooth libraries
+PRODUCT_PACKAGES += \
+    audio.a2dp.default \
+    audio.hearing_aid.default \
+
 # Enable dynamic partition size
 PRODUCT_USE_DYNAMIC_PARTITION_SIZE := true