ART: More refactor for JVMTI run tests (1/3)

Put (most) tests into a new package and give them dedicated
class names (Test9XY).

NOTE: BROKEN WITHOUT A FOLLOW-UP CL TO CHANGE DIRECTORY STRUCTURE
      AND FILE NAMES!

Bug: 32072923
Test: None
Change-Id: I291b0543f7782914e446a74f0d9037020c88e5b5
diff --git a/test/904-object-allocation/tracking.cc b/test/904-object-allocation/tracking.cc
index c829496..8de350b 100644
--- a/test/904-object-allocation/tracking.cc
+++ b/test/904-object-allocation/tracking.cc
@@ -57,7 +57,7 @@
          static_cast<size_t>(size));
 }
 
-extern "C" JNIEXPORT void JNICALL Java_Main_setupObjectAllocCallback(
+extern "C" JNIEXPORT void JNICALL Java_art_Test904_setupObjectAllocCallback(
     JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jboolean enable) {
   jvmtiEventCallbacks callbacks;
   memset(&callbacks, 0, sizeof(jvmtiEventCallbacks));
@@ -67,10 +67,8 @@
   JvmtiErrorToException(env, jvmti_env, ret);
 }
 
-extern "C" JNIEXPORT void JNICALL Java_Main_enableAllocationTracking(JNIEnv* env,
-                                                                     jclass,
-                                                                     jthread thread,
-                                                                     jboolean enable) {
+extern "C" JNIEXPORT void JNICALL Java_art_Test904_enableAllocationTracking(
+    JNIEnv* env, jclass, jthread thread, jboolean enable) {
   jvmtiError ret = jvmti_env->SetEventNotificationMode(
       enable ? JVMTI_ENABLE : JVMTI_DISABLE,
       JVMTI_EVENT_VM_OBJECT_ALLOC,