Camera2/3: Add more tracing for API1

- AF state
- Async autofocus completion
- Async takePicture completion
- Stages of takePicture

Bug: 10570497
Change-Id: Ida9fedd81aa4ee3ae3fb8dfada858a3bc3c213a3
diff --git a/services/camera/libcameraservice/api1/Camera2Client.h b/services/camera/libcameraservice/api1/Camera2Client.h
index 53629a1..fe0bf74 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.h
+++ b/services/camera/libcameraservice/api1/Camera2Client.h
@@ -136,6 +136,10 @@
     static const int32_t kCaptureRequestIdStart = 30000000;
     static const int32_t kCaptureRequestIdEnd   = 40000000;
 
+    // Constant strings for ATRACE logging
+    static const char* kAutofocusLabel;
+    static const char* kTakepictureLabel;
+
 private:
     /** ICamera interface-related private members */
     typedef camera2::Parameters Parameters;