Update Security String to 2020-05-01 am: db9b1bd6fd

Change-Id: I7c75df48e4d4a0f450fd36e2319b434d92bd2bd5
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index ed88551..054a3eb 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -255,7 +255,7 @@
     #  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 := 2020-04-05
+      PLATFORM_SECURITY_PATCH := 2020-05-01
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH