Update ShannonIms CERTIFICATE to PRESIGNED

Bug: 298956897
Change-Id: I0680982853a630b2c3744278f7a09b356ff2cb69
diff --git a/self-extractors/google_devices/staging/Android.mk b/self-extractors/google_devices/staging/Android.mk
index 4bb909d..6c380d9 100644
--- a/self-extractors/google_devices/staging/Android.mk
+++ b/self-extractors/google_devices/staging/Android.mk
@@ -48,7 +48,7 @@
 LOCAL_MODULE_OWNER := samsung
 LOCAL_MODULE_CLASS := APPS
 LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
-LOCAL_CERTIFICATE := platform
+LOCAL_CERTIFICATE := PRESIGNED
 LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0
 LOCAL_LICENSE_CONDITIONS := notice
 LOCAL_NOTICE_FILE := $(LOCAL_PATH)/../COPYRIGHT $(LOCAL_PATH)/../LICENSE