Factoring out camera_params.proto.

Change-Id: Idf886f9cb33764d505d5cff11ca766cea96d2024
diff --git a/aos/vision/image/BUILD b/aos/vision/image/BUILD
index 662addc..27646a5 100644
--- a/aos/vision/image/BUILD
+++ b/aos/vision/image/BUILD
@@ -1,4 +1,5 @@
 package(default_visibility = ['//visibility:public'])
+load('/tools/build_rules/protobuf', 'proto_cc_library')
 
 cc_library(
   name = 'image_types',
@@ -8,6 +9,11 @@
   ],
 )
 
+proto_cc_library(
+  name = 'camera_params',
+  src = 'camera_params.proto',
+)
+
 cc_library(
   name = 'reader',
   srcs = ['reader.cc'],
@@ -16,6 +22,7 @@
     '//aos/common:time',
     '//aos/common/logging:logging',
     ':image_types',
+    ':camera_params',
   ],
 )