Adding API annotation to AudioCapabilitiesTest

Bug: 222751373
Test: make CtsVerifier -j32
Change-Id: I166f731c7e3f83bbb0fe806111b6a823d2eff646
diff --git a/apps/CtsVerifier/AndroidManifest.xml b/apps/CtsVerifier/AndroidManifest.xml
index 36f4258..1aae6a2 100644
--- a/apps/CtsVerifier/AndroidManifest.xml
+++ b/apps/CtsVerifier/AndroidManifest.xml
@@ -4831,6 +4831,8 @@
                        android:value="android.software.leanback" />
             <meta-data android:name="test_required_configs"
                        android:value="config_hdmi_source" />
+            <meta-data android:name="ApiTest"
+                       android:value="android.media.AudioTrack#isDirectPlaybackSupported" />
         </activity>
 
         <activity android:name=".tv.display.HotplugTestActivity"