Merge changes from topics "revert-2897484-revert-2897682-dont_limit_systemsdk-JCOOOXGAIF-BSJGJAJAWC", "revert-2897568-revert-2894701-limit_systemsdk-WNEMOTGMRS-ROJNXPXKUV" into main am: 32fd2dee4f am: 6ed485ed67

Original change: https://android-review.googlesource.com/c/platform/build/+/2897686

Change-Id: I539fa80234b0d752af7d0bad603654950ad81d43
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/core/build_id.mk b/core/build_id.mk
index bed839f..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=MAIN
+BUILD_ID=UDC