Update Security String to 2020-11-01 am: efacba8eef am: ec316d384e

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/12617844

Change-Id: I1c1450cb56abd65483da13a2d3cf89967ab1e860
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 75cc534..c9ecd8b 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -181,7 +181,7 @@
     #  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 := 2020-10-01
+      PLATFORM_SECURITY_PATCH := 2020-11-01
 endif
 
 ifndef PLATFORM_BASE_OS