HERESDK-3466: Preserve thread name after attaching it to JVM (#1597)

* HERESDK-3466: Preserve thread name after attaching it to JVM

When native thread is attached to JVM, then it's name is taken from `JavaVMAttachArgs`. When no `JavaVMAttachArgs`, or no `JavaVMAttachArgs::name` passed, then JVM on its own decides on taming thread. Those names are not descriptive.
To preserve thread name, pass the currently set thread name in `JavaVMAttachArgs::name`.
`pthread_getname_np` was introduced in API 26, hence use more generic approach.

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Signed-off-by: Mykhailo Diachenko <ext-mykhailo.z.diachenko@here.com>

gluecodium/src/main/resources/templates/jni/utils/JniBaseImplementation.mustache

@@ -32,17 +32,33 @@ static JavaVM* jvm;
 
 static pthread_key_t s_thread_key;
 
+char *get_thread_name()
+{
+#ifdef __ANDROID__
+    thread_local char name[17] = {0};
+    if (prctl(PR_GET_NAME, name) == 0)
+    {
+        return name;
+    }
+#endif
+    return nullptr;
+}
+
 JNIEnv*
 attach_current_thread( )
 {
     JNIEnv* jniEnv;
     int envState = jvm->GetEnv( reinterpret_cast< void** >( &jniEnv ), JNI_VERSION_1_6 );
     if ( envState == JNI_EDETACHED )
     {
+        JavaVMAttachArgs args;
+        args.version = JNI_VERSION_1_6;
+        args.group = NULL;
+        args.name = get_thread_name();
 #ifdef __ANDROID__
-        jvm->AttachCurrentThread( &jniEnv, nullptr );
+        jvm->AttachCurrentThread( &jniEnv, &args );
 #else   // ifdef __ANDROID__
-        jvm->AttachCurrentThread( reinterpret_cast< void** >( &jniEnv ), nullptr );
+        jvm->AttachCurrentThread( reinterpret_cast< void** >( &jniEnv ), &args );
 #endif  // ifdef __ANDROID__
     }