Update Security String to 2020-03-05
Bug:147450082
(cherry picked from commit 20c6e7dbe1b2c96154613aebce7080ffe2f05d07)

Change-Id: If91cd1ba76ca9ce141bf10eff9df71ceb555518d
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 98d777d..1e517c5 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -250,7 +250,7 @@
     #  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 := 2020-03-01
+      PLATFORM_SECURITY_PATCH := 2020-03-05
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH