Cleanup: use shared apex_key (vibrator HAL APEX)

plus, moved VINTF fragment into VAPEX

Bug: 296524155
Test: m
Change-Id: I1453174ab8229af56cff5886126de77eb9129ed7
diff --git a/vibrator/aidl/default/Android.bp b/vibrator/aidl/default/Android.bp
index 78bb4ed..fb71a82 100644
--- a/vibrator/aidl/default/Android.bp
+++ b/vibrator/aidl/default/Android.bp
@@ -32,9 +32,11 @@
     },
 }
 
-filegroup {
+prebuilt_etc {
     name: "android.hardware.vibrator.xml",
-    srcs: ["android.hardware.vibrator.xml"],
+    src: "android.hardware.vibrator.xml",
+    sub_dir: "vintf",
+    installable: false,
 }
 
 cc_binary {