Enable the Hearing Aid Profile for Pixel 1 and 2

The Hearing Aid Profile was disable in an upstreamed branch and we need
to re-enable it here.

Test: Compile
Change-Id: If73a9f2e9a8fa7e82e648ac9b8eff3463994932f
diff --git a/overlay/packages/apps/Bluetooth/res/values/config.xml b/overlay/packages/apps/Bluetooth/res/values/config.xml
index 9b897f8..0e8c392 100644
--- a/overlay/packages/apps/Bluetooth/res/values/config.xml
+++ b/overlay/packages/apps/Bluetooth/res/values/config.xml
@@ -32,5 +32,6 @@
     <bool name="profile_supported_avrcp_controller">false</bool>
     <bool name="profile_supported_a2dp_sink">false</bool>
     <bool name="profile_supported_sap">true</bool>
+    <bool name="profile_supported_hearing_aid">true</bool>
 </resources>