Look for release_config_map.mk in more projects

This allows us to split up build/release for better clarity.

Bug: b/328495189
Test: manual
Change-Id: If810780de164b74c3e3ebc35260384843de2c084
diff --git a/core/release_config.mk b/core/release_config.mk
index 8d19bc7..a6152bd 100644
--- a/core/release_config.mk
+++ b/core/release_config.mk
@@ -41,7 +41,9 @@
 # which has OWNERS control.  If it isn't let others define their own.
 # TODO: Remove wildcard for build/release one when all branch manifests
 # have updated.
-config_map_files := $(wildcard build/release/release_config_map.mk) \
+config_map_files := $(wildcard build/trunk_release/release_config_map.mk) \
+    $(wildcard build/release/release_config_map.mk) \
+    $(wildcard vendor/google_shared/build/release/release_config_map.mk) \
     $(if $(wildcard vendor/google/release/release_config_map.mk), \
         vendor/google/release/release_config_map.mk, \
         $(sort \