fstab: add the noatime for read-only ext4 partitions

This is to avoid unnecessary ext4 behavior

Bug: 289631992
Test: boot to home
Change-Id: I5efdb979e9c738964350b221b9f5fffea19c721d
Signed-off-by: Randall Huang <huangrandall@google.com>
diff --git a/conf/fstab.gs101.in b/conf/fstab.gs101.in
index ef84e9b..ba56441 100644
--- a/conf/fstab.gs101.in
+++ b/conf/fstab.gs101.in
@@ -4,16 +4,16 @@
 # specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
 #
 #<src>                                                   <mnt_point>                 <type>  <mnt_flags and options>  <fs_mgr_flags>
-system                                                   /system                     ext4    ro,barrier=1             wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,readahead_size_kb=128
-system_ext                                               /system_ext                 ext4    ro,barrier=1             wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,readahead_size_kb=128
-product                                                  /product                    ext4    ro,barrier=1             wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,readahead_size_kb=128
-vendor                                                   /vendor                     ext4    ro,barrier=1             wait,slotselect,avb=vbmeta_vendor,logical,first_stage_mount,readahead_size_kb=128
-vendor_dlkm                                              /vendor_dlkm                ext4    ro,barrier=1             wait,slotselect,avb=vbmeta,logical,first_stage_mount
+system                                                   /system                     ext4    noatime,ro             wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,readahead_size_kb=128
+system_ext                                               /system_ext                 ext4    noatime,ro             wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,readahead_size_kb=128
+product                                                  /product                    ext4    noatime,ro             wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,readahead_size_kb=128
+vendor                                                   /vendor                     ext4    noatime,ro             wait,slotselect,avb=vbmeta_vendor,logical,first_stage_mount,readahead_size_kb=128
+vendor_dlkm                                              /vendor_dlkm                ext4    noatime,ro             wait,slotselect,avb=vbmeta,logical,first_stage_mount
 /dev/block/platform/14700000.ufs/by-name/boot            /boot                       emmc    defaults                 slotselect,avb=boot,first_stage_mount
 /dev/block/platform/14700000.ufs/by-name/efs             /mnt/vendor/efs             ext4    defaults,noatime,rw      wait,check,formattable
 /dev/block/platform/14700000.ufs/by-name/efs_backup      /mnt/vendor/efs_backup      ext4    defaults,noatime,rw      wait,check,formattable
 /dev/block/platform/14700000.ufs/by-name/modem_userdata  /mnt/vendor/modem_userdata  ext4    defaults,noatime,rw      wait,check,formattable
-/dev/block/platform/14700000.ufs/by-name/modem           /mnt/vendor/modem_img       ext4    ro,defaults,context=u:object_r:modem_img_file:s0,barrier=1    wait,slotselect
+/dev/block/platform/14700000.ufs/by-name/modem           /mnt/vendor/modem_img       ext4    noatime,ro,context=u:object_r:modem_img_file:s0    wait,slotselect
 /dev/block/platform/14700000.ufs/by-name/misc            /misc                       emmc    defaults                 wait
 /dev/block/platform/14700000.ufs/by-name/metadata        /metadata                   ext4    noatime,nosuid,nodev,data=journal,commit=1    wait,check,formattable,first_stage_mount,metadata_csum
 /dev/block/platform/14700000.ufs/by-name/pvmfw           /pvmfw                      emmc    defaults                 wait,slotselect,avb=pvmfw,first_stage_mount