[Bluetooth apex] Use new apex name

The Bluetooth apex name is now called com.android.btservices

Bug: 243054261
Test: Build
Change-Id: Ib63646722cbef948b5198fc5f2a9b5ac2ca52ae3
diff --git a/bluetooth/audio/2.1/Android.bp b/bluetooth/audio/2.1/Android.bp
index 1175fb3..4ca0bef 100644
--- a/bluetooth/audio/2.1/Android.bp
+++ b/bluetooth/audio/2.1/Android.bp
@@ -25,7 +25,7 @@
     ],
     apex_available: [
         "//apex_available:platform",
-        "com.android.bluetooth",
+        "com.android.btservices",
     ],
     gen_java: false,
 }