Update Security String to 2022-04-01 am: 8eac089eef

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/16742829

Change-Id: If98d4933213b665cefdbbdb2b3106927e2b56443
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 3511d63..4b3a78c 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 := 2022-03-01
+      PLATFORM_SECURITY_PATCH := 2022-04-01
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH