RESTRICT AUTOMERGE Set BUILD_ID=SC

Bug: 196178071
Bug: 196043450
Bug: 171506470
Test: adb shell getprop ro.build.fingerprint
Change-Id: I80596f736ce5421530ccaaa035075ceb801a6fe2
diff --git a/core/build_id.mk b/core/build_id.mk
index 2f9c3f3..84429d2 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID=MASTER
+BUILD_ID=SC