aidl: Improve Effect VTS naming

Use uuid in hexadecimal format in testcase name.

Change-Id: Ib687b6617060e4400a767f23ca0b26cece4005f1
diff --git a/audio/aidl/vts/VtsHalAECTargetTest.cpp b/audio/aidl/vts/VtsHalAECTargetTest.cpp
index 8828c41..4f658f2 100644
--- a/audio/aidl/vts/VtsHalAECTargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAECTargetTest.cpp
@@ -162,9 +162,7 @@
             auto descriptor = std::get<PARAM_INSTANCE_NAME>(info.param).second;
             std::string echoDelay = std::to_string(std::get<PARAM_ECHO_DELAY>(info.param));
             std::string mobileMode = std::get<PARAM_MOBILE_MODE>(info.param) ? "true" : "false";
-            std::string name = "Implementor_" + descriptor.common.implementor + "_name_" +
-                               descriptor.common.name + "_UUID_" +
-                               descriptor.common.id.uuid.toString() + "_EchoDelay_" + echoDelay +
+            std::string name = getPrefix(descriptor) + "_EchoDelay_" + echoDelay +
                                "_MobileMode_" + mobileMode;
             std::replace_if(
                     name.begin(), name.end(), [](const char c) { return !std::isalnum(c); }, '_');