feat: add profiled DualSense PCM haptics experiment

tests/haptics_transport_probe_native_stubs/pico/critical_section.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <cassert>
+
+struct critical_section_t {
+    bool initialized = false;
+};
+inline unsigned native_probe_lock_depth = 0;
+inline void critical_section_init(critical_section_t* section) {
+    assert(!section->initialized);
+    section->initialized = true;
+}
+inline void critical_section_enter_blocking(critical_section_t* section) {
+    assert(section->initialized && native_probe_lock_depth == 0);
+    ++native_probe_lock_depth;
+}
+inline void critical_section_exit(critical_section_t*) {
+    assert(native_probe_lock_depth == 1);
+    --native_probe_lock_depth;
+}

tests/haptics_transport_probe_native_stubs/pico/stdlib.h

@@ -0,0 +1,4 @@
+#pragma once
+
+#include <stdint.h>
+uint64_t time_us_64();