Add Camera2Raw to build.gradle (DO NOT MERGE)

This was already committed downstream in mnc-dev, but cherry-picking
this sample back to lmp-mr1-ub-docs.

Change-Id: I6dc5e85982511c526d11296be9883fcc64eb8c95
diff --git a/build.gradle b/build.gradle
index cdaf043..9ced21d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -99,6 +99,7 @@
 "wearable/wear/XYZTouristAttractions",
 "connectivity/bluetooth/BluetoothAdvertisements",
 "wearable/wear/AlwaysOn",
+"media/Camera2Raw",
 ]
 
 List<String> taskNames = [