Clear apex.go entries for bluetooth libs

The module availability to Bluetooth is currently hard-coded in apex.go.
We are in the process of cleaning the apex.go by adding the availability
in each required module

Test: Build + TH + boot phone & use bluetooth
Bug: 216433795
Change-Id: I209b24a68da8c21f9eddb2518e57667b0d9bab79
diff --git a/Android.bp b/Android.bp
index 5b019d0..a0c5c1b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -117,4 +117,8 @@
         },
     },
     min_sdk_version: "30",
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.bluetooth",
+    ],
 }