Audio V4: XSD device category was missing hearing aid

Bug: 77307068
Test: atest VtsHalAudioV4_0TargetTest
Change-Id: I9de9b826d01fe90c1a7d16631d0f808b29ad4775
Signed-off-by: Kevin Rocard <krocard@google.com>
diff --git a/audio/4.0/config/audio_policy_configuration.xsd b/audio/4.0/config/audio_policy_configuration.xsd
index 14e4fd6..ee17fc9 100644
--- a/audio/4.0/config/audio_policy_configuration.xsd
+++ b/audio/4.0/config/audio_policy_configuration.xsd
@@ -525,6 +525,7 @@
             <xs:enumeration value="DEVICE_CATEGORY_SPEAKER"/>
             <xs:enumeration value="DEVICE_CATEGORY_EARPIECE"/>
             <xs:enumeration value="DEVICE_CATEGORY_EXT_MEDIA"/>
+            <xs:enumeration value="DEVICE_CATEGORY_HEARING_AID"/>
         </xs:restriction>
     </xs:simpleType>
     <xs:complexType name="volume">