aidl: Improve Effect VTS naming

Use uuid in hexadecimal format in testcase name.

Change-Id: Ib687b6617060e4400a767f23ca0b26cece4005f1
diff --git a/audio/aidl/vts/VtsHalAGC2TargetTest.cpp b/audio/aidl/vts/VtsHalAGC2TargetTest.cpp
index 8ba8e45..46a569e 100644
--- a/audio/aidl/vts/VtsHalAGC2TargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAGC2TargetTest.cpp
@@ -183,9 +183,7 @@
             std::string margin =
                     std::to_string(static_cast<int>(std::get<PARAM_SATURATION_MARGIN>(info.param)));
 
-            std::string name = "Implementor_" + descriptor.common.implementor + "_name_" +
-                               descriptor.common.name + "_UUID_" +
-                               descriptor.common.id.uuid.toString() + "_digital_gain_" + gain +
+            std::string name = getPrefix(descriptor) + "_digital_gain_" + gain +
                                "_level_estimator_" + estimator + "_margin_" + margin;
             std::replace_if(
                     name.begin(), name.end(), [](const char c) { return !std::isalnum(c); }, '_');