Add VTS test for validating audio effects config against XML schema

If the device contains /vendor/etc/audio_effects.xml (the new XML
format for the audio effects configuration), the test validates
this config against the schema contained in
audio/effect/2.0/xml/audio_effects_conf_V2_0.xsd
(pushed to the device by the VTS test runner)

Change-Id: Ib57d30e3c1e32ce5d74f906a216f9bb8f635a28c
Test: this is a test
Bug: 37492580
diff --git a/audio/effect/2.0/vts/functional/Android.bp b/audio/effect/2.0/vts/functional/Android.bp
index 8a370cd..b3002a4 100644
--- a/audio/effect/2.0/vts/functional/Android.bp
+++ b/audio/effect/2.0/vts/functional/Android.bp
@@ -17,7 +17,8 @@
 cc_test {
     name: "VtsHalAudioEffectV2_0TargetTest",
     defaults: ["hidl_defaults"],
-    srcs: ["VtsHalAudioEffectV2_0TargetTest.cpp"],
+    srcs: ["VtsHalAudioEffectV2_0TargetTest.cpp",
+           "ValidateAudioEffectsConfiguration.cpp"],
     shared_libs: [
         "libbase",
         "liblog",
@@ -26,7 +27,9 @@
         "libhidltransport",
         "libnativehelper",
         "libutils",
+        "libxml2",
         "android.hardware.audio.common@2.0",
+        "android.hardware.audio.common.test.utility",
         "android.hardware.audio.effect@2.0",
         "android.hidl.allocator@1.0",
         "android.hidl.memory@1.0",
@@ -35,5 +38,6 @@
     cflags: [
         "-O0",
         "-g",
+        "-Wextra",
     ],
 }