Update Security String to 2020-12-01

Bug: 170492812
Change-Id: I591ddb5212425bed73ed3b03e392d4c79850e602
Merged-In: I61eac7915ab4b23227c3263d3f33a0f71dc3a107
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 3813e64..fc20b45 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -165,7 +165,7 @@
     #  It must be of the form "YYYY-MM-DD" on production devices.
     #  It must match one of the Android Security Patch Level strings of the Public Security Bulletins.
     #  If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-      PLATFORM_SECURITY_PATCH := 2020-11-01
+      PLATFORM_SECURITY_PATCH := 2020-12-01
 endif
 
 ifndef PLATFORM_BASE_OS