Update Security String to 2021-07-01

Bug: 188458861
Change-Id: I37f910ad48858038c97b86e2b04f9f3b9761c868
Merged-In: Icdc728241b1bfe2428d1e6536a1a3b51f7a4a708
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index c754124..0842806 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 := 2021-06-01
+      PLATFORM_SECURITY_PATCH := 2021-07-01
 endif
 
 ifndef PLATFORM_BASE_OS