Update Security String to 2019-07-01
Bug:132634503
(cherry picked from commit 95bee0f53ed9f82c4e1ca27a5004eb1e917fa65c)

Change-Id: Ib6e10423216a15e930461317296a748064dc4055
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 07e6c95..1b49b3a 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -231,7 +231,7 @@
     #  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 := 2019-06-05
+      PLATFORM_SECURITY_PATCH := 2019-07-01
 endif
 
 ifndef PLATFORM_SECURITY_PATCH_TIMESTAMP