Modify apex_available to Bluetooth apex

Bluetooth apex name has changed from com.android.btservices to
com.android.bt. We now need to update the reference in the code.

Updating apex_available in bp and other reference from within the code

Bug: 383863941
Flag: Exempt build infra
Test: m .
Change-Id: I7202280acb827208dcb836dde5e727dbe2e2578f
diff --git a/Android.bp b/Android.bp
index c716a06..8285e83 100644
--- a/Android.bp
+++ b/Android.bp
@@ -78,7 +78,7 @@
             min_sdk_version: "29",
             apex_available: [
                 "//apex_available:platform",
-                "com.android.btservices",
+                "com.android.bt",
                 "com.android.media",
                 "com.android.media.swcodec",
             ],
@@ -122,7 +122,7 @@
     min_sdk_version: "29",
     apex_available: [
         "//apex_available:platform",
-        "com.android.btservices",
+        "com.android.bt",
         "com.android.media",
         "com.android.media.swcodec",
     ],