flutter-pi: allow getting tracer of flutterpi instance

Author: ardera

src/flutter-pi.c

@@ -1039,6 +1039,11 @@ struct gl_renderer *flutterpi_get_gl_renderer(struct flutterpi *flutterpi) {
     return flutterpi->gl_renderer;
 }
 
+struct tracer *flutterpi_get_tracer(struct flutterpi *flutterpi) {
+    ASSERT_NOT_NULL(flutterpi);
+    return flutterpi->tracer;
+}
+
 void flutterpi_set_pointer_kind(struct flutterpi *flutterpi, enum pointer_kind kind) {
     return compositor_set_cursor(flutterpi->compositor, false, false, true, kind, false, VEC2F(0, 0));
 }

src/flutter-pi.h

@@ -92,6 +92,7 @@ struct drmdev;
 struct locales;
 struct vk_renderer;
 struct flutterpi;
+struct tracer;
 
 /// TODO: Remove this
 extern struct flutterpi *flutterpi;
@@ -188,6 +189,8 @@ bool flutterpi_has_gl_renderer(struct flutterpi *flutterpi);
 
 struct gl_renderer *flutterpi_get_gl_renderer(struct flutterpi *flutterpi);
 
+struct tracer *flutterpi_get_tracer(struct flutterpi *flutterpi);
+
 void flutterpi_set_pointer_kind(struct flutterpi *flutterpi, enum pointer_kind kind);
 
 void flutterpi_trace_event_instant(struct flutterpi *flutterpi, const char *name);