Add VTS test for automotive AudioControl HAL

Difficult to verify results, but at least exercises the APIs.

Bug: 71614544
Test: adb push ...VtsHalAudioControlV1_0TargetTest /data/actst; adb shell
/data/actst
Merged-In: Ie900a4e47483ef881e00a4753097dbd09a0730a0
Change-Id: Ie900a4e47483ef881e00a4753097dbd09a0730a0
diff --git a/automotive/audiocontrol/1.0/IAudioControl.hal b/automotive/audiocontrol/1.0/IAudioControl.hal
index c029499..3c8b086 100644
--- a/automotive/audiocontrol/1.0/IAudioControl.hal
+++ b/automotive/audiocontrol/1.0/IAudioControl.hal
@@ -29,10 +29,8 @@
      *
      * For every context, a valid bus number (0 - num busses-1) must be returned. If an
      * unrecognized contextNumber is encountered, then -1 shall be returned.
-     *
-     * Any context for which an invalid busNumber is returned must be routed to bus 0.
      */
-    getBusForContext(uint32_t contextNumber)
+    getBusForContext(ContextNumber contextNumber)
         generates (int32_t busNumber);