audio: move USE_AUDIO_HAL_AIDL to device-<project>.mk

Bug: 317745810
Test: manual test b/317745810#comment3

Change-Id: Ie6f1660dcf9d26bd14061ead187e1f3d8848d565
Signed-off-by: Jasmine Cha <chajasmine@google.com>
diff --git a/audio/aidl.mk b/audio/aidl.mk
index 711f389..185e628 100644
--- a/audio/aidl.mk
+++ b/audio/aidl.mk
@@ -1,4 +1,3 @@
-USE_AUDIO_HAL_AIDL := true
 
 DEVICE_MANIFEST_FILE += device/google/gs-common/audio/aidl/manifest.xml