ANDROID: set kmi_symbol_list_add_only for Kleaf builds.

On KMI frozen branches, symbols may no longer be removed
from KMI symbol lists.

This change sets kmi_symbol_list_add_only=true for Kleaf builds.

Test: Treehugger
Bug: 292106238
Change-Id: I74cf98ebad2705b92468c996e9b3b472447e8203
Signed-off-by: Yifan Hong <elsk@google.com>
diff --git a/BUILD.bazel b/BUILD.bazel
index acddd7e..e583262 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -68,6 +68,7 @@
         "kmi_symbol_list_strict_mode": True,
         "module_implicit_outs": COMMON_GKI_MODULES_LIST,
         "kmi_symbol_list": "android/abi_gki_aarch64",
+        "kmi_symbol_list_add_only": True,
         "additional_kmi_symbol_lists": [":aarch64_additional_kmi_symbol_lists"],
         "protected_exports_list": "android/abi_gki_protected_exports_aarch64",
         "protected_modules_list": "android/gki_aarch64_protected_modules",
@@ -82,6 +83,7 @@
         "kmi_symbol_list_strict_mode": False,
         "module_implicit_outs": COMMON_GKI_MODULES_LIST,
         "kmi_symbol_list": "android/abi_gki_aarch64",
+        "kmi_symbol_list_add_only": True,
         "additional_kmi_symbol_lists": [":aarch64_additional_kmi_symbol_lists"],
         "protected_exports_list": "android/abi_gki_protected_exports_aarch64",
         "protected_modules_list": "android/gki_aarch64_protected_modules",