Android W -> B

Android 16 is B, not W.

Bug: 384614121
Test: build/make/tools/finalization/build-step-0.sh --steps_for_build_test_only
(cherry picked from https://android-review.googlesource.com/q/commit:7f6fc71dfd523f39259f8bd64444cb7e8b3f16fe)
Merged-In: I4d057695a2d9f7b443e645a42af29e8e8f09329d
Change-Id: I4d057695a2d9f7b443e645a42af29e8e8f09329d
diff --git a/tools/finalization/environment.sh b/tools/finalization/environment.sh
index 9a287c4..c76980d 100755
--- a/tools/finalization/environment.sh
+++ b/tools/finalization/environment.sh
@@ -30,8 +30,8 @@
 # TODO(b/323985297): The version must match with that from the release configuration.
 # Instead of hardcoding the version here, read it from a release configuration.
 export FINAL_BOARD_API_LEVEL='202504'
-export FINAL_CORRESPONDING_VERSION_LETTER='W'
+export FINAL_CORRESPONDING_VERSION_LETTER='B'
 export FINAL_CORRESPONDING_PLATFORM_VERSION='16'
 export FINAL_NEXT_BOARD_API_LEVEL='202604'
-export FINAL_NEXT_CORRESPONDING_VERSION_LETTER='X'
+export FINAL_NEXT_CORRESPONDING_VERSION_LETTER='C'
 export FINAL_NEXT_CORRESPONDING_SDK_VERSION='37'