Fix ODR violations caused by mojoms being included in multiple components.

device/generic_sensor/public/cpp/BUILD.gn

Index: device/generic_sensor/public/cpp/BUILD.gn
diff --git a/device/generic_sensor/public/cpp/BUILD.gn b/device/generic_sensor/public/cpp/BUILD.gn
index 08332776bcee28cf17c8685d01d661275be0f10a..420fffb27a80ad7a789d280e358bd9ff99bd322d 100644
--- a/device/generic_sensor/public/cpp/BUILD.gn
+++ b/device/generic_sensor/public/cpp/BUILD.gn
@@ -10,11 +10,14 @@ component("cpp") {
     "sensor_reading.h",
   ]
 
-  defines = [ "DEVICE_GENERIC_SENSOR_IMPLEMENTATION" ]
+  defines = [ "DEVICE_GENERIC_SENSOR_PUBLIC_IMPLEMENTATION" ]
+
+  public_deps = [
+    "//device/generic_sensor/public/interfaces",
+  ]
 
   deps = [
     "//base",
     "//device/base/synchronization",
-    "//device/generic_sensor/public/interfaces",
   ]
 }