DO NOT MERGE  Designate udc-dev* branches as UDC.

Ignore-AOSP-First: The UDC designation only applies to udc-* branches.

BUG=297873435

Change-Id: I6efcbbc2ce714f7686806b735525a49531f8b24c
Merged-In: If49ce93abe63ad4e624a00454fcb3aa712f2d976
diff --git a/core/build_id.mk b/core/build_id.mk
index 2f9c3f3..8a68056 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=UDC