Add a proto for frametimeline events

This change adds a new proto for the upcoming frametimeline events that
will be emitted from SurfaceFlinger's FrameTimeline module. This is
useful in tracking the expected vs actual timeline for app frames.

Bug: 170914689
Test: None yet - just a proto file
Change-Id: I8de245e2063ef87900951401df31807780fd0f5a
diff --git a/BUILD b/BUILD
index 7cb3963..9c8710e 100644
--- a/BUILD
+++ b/BUILD
@@ -2224,6 +2224,7 @@
     name = "protos_perfetto_trace_android_protos",
     srcs = [
         "protos/perfetto/trace/android/android_log.proto",
+        "protos/perfetto/trace/android/frame_timeline_event.proto",
         "protos/perfetto/trace/android/gpu_mem_event.proto",
         "protos/perfetto/trace/android/graphics_frame_event.proto",
         "protos/perfetto/trace/android/initial_display_state.proto",