VintfObject: Fix getHalNamesAndVersions doc

Test: CTS device info collect
Bug: 140832836
Change-Id: Iddc3c36d15370baa661e485b76c490a5d2b7815c
diff --git a/core/java/android/os/VintfObject.java b/core/java/android/os/VintfObject.java
index 23c54f4..1c78b08 100644
--- a/core/java/android/os/VintfObject.java
+++ b/core/java/android/os/VintfObject.java
@@ -72,6 +72,8 @@
      * ["android.hidl.manager@1.0", "android.hardware.camera.device@1.0",
      *  "android.hardware.camera.device@3.2"]. There are no duplicates.
      *
+     * For AIDL HALs, the version is stripped away
+     * (e.g. "android.hardware.light").
      * @hide
      */
     @TestApi