audio: Remove dependency on libxml2 from the default implementation

The default implementation switched to use the "enums"
module generated from the audio_policy_configuration.xsd schema.

This drops the dependency on libxml2 library and reduces
PSS and private dirty memory usage.

Bug: 180413957
Test: atest VtsHalAudioV7_0TargetTest
Change-Id: If7c110cd2bd2698923957b39906a0896d18065dd
diff --git a/audio/7.0/config/Android.bp b/audio/7.0/config/Android.bp
index f67cc7c..4a46795 100644
--- a/audio/7.0/config/Android.bp
+++ b/audio/7.0/config/Android.bp
@@ -4,3 +4,19 @@
     package_name: "android.audio.policy.configuration.V7_0",
     nullability: true,
 }
+
+xsd_config {
+    name: "audio_policy_configuration_V7_0_enums",
+    srcs: ["audio_policy_configuration.xsd"],
+    package_name: "android.audio.policy.configuration.V7_0",
+    nullability: true,
+    enums_only: true,
+}
+
+xsd_config {
+    name: "audio_policy_configuration_V7_0_parser",
+    srcs: ["audio_policy_configuration.xsd"],
+    package_name: "android.audio.policy.configuration.V7_0",
+    nullability: true,
+    parser_only: true,
+}