avb_keys=/avb for system_dlkm in cuttlefish

we can use vbmeta from end of the image in the case of
mixing different products' images

Bug: 298075407
Bug: 289368466
Test: booting
Change-Id: If2c2c3f58ef7f48024caa9441d69b89fc6fae28a
diff --git a/shared/config/fstab.in b/shared/config/fstab.in
index 360a4a1..0f7cc74 100644
--- a/shared/config/fstab.in
+++ b/shared/config/fstab.in
@@ -22,8 +22,8 @@
 vendor_dlkm /vendor_dlkm ext4 noatime,ro,errors=panic wait,logical,first_stage_mount,slotselect,avb=vbmeta_vendor_dlkm
 odm_dlkm /odm_dlkm erofs ro wait,logical,first_stage_mount,slotselect,avb
 odm_dlkm /odm_dlkm ext4 noatime,ro,errors=panic wait,logical,first_stage_mount,slotselect,avb
-system_dlkm /system_dlkm erofs ro wait,logical,first_stage_mount,slotselect,avb=vbmeta_system_dlkm
-system_dlkm /system_dlkm ext4 noatime,ro,errors=panic wait,logical,first_stage_mount,slotselect,avb=vbmeta_system_dlkm
+system_dlkm /system_dlkm erofs ro wait,logical,first_stage_mount,slotselect,avb=vbmeta_system_dlkm,avb_keys=/avb
+system_dlkm /system_dlkm ext4 noatime,ro,errors=panic wait,logical,first_stage_mount,slotselect,avb=vbmeta_system_dlkm,avb_keys=/avb
 # ZRAM, SD-Card and virtiofs shares
 /dev/block/zram0 none swap defaults zramsize=75%
 /dev/block/vdc1 /sdcard vfat defaults recoveryonly