modules: camera: Update trace headers to libutils

Now that libutils is outside of frameworks, use that for c++-style
scoped tracing and remove the temporary shim header.

Change-Id: I913767aed8ff70abb9299e7a7b318b24a25e23c1
diff --git a/modules/camera/Android.mk b/modules/camera/Android.mk
index e02a143..ba6852f 100644
--- a/modules/camera/Android.mk
+++ b/modules/camera/Android.mk
@@ -34,6 +34,7 @@
 	libcutils \
 	liblog \
 	libsync \
+	libutils \
 
 LOCAL_CFLAGS += -Wall -Wextra -fvisibility=hidden