Move e2fsck into /first_stage_ramdisk.

On devices without a dedicated recovery partition, it is possible that
e2fsck exists in /system/bin, not /first_stage_ramdisk/system/bin, if
it is using generic ramdisk. When force_normal_boot, /system/bin/e2fsck
would not exist during first stage mount.

In this case, move /first_stage_ramdisk/system/bin/e2fsck to
/system/bin/e2fsck before switching root into /first_stage_ramdisk.
Abort if the operation fails.

On devices launching with R, e2fsck should already exist in the correct
place, so skip moving if force_normal_boot and
/first_stage_ramdisk/system/bin/e2fsck already exists.

On devices launching before R, it is possible that /system/bin/e2fsck
does not exist. Skip moving if force_normal_boot and /system/bin/e2fsck
does not exist.

Fixes: 171326057
Test: boot with GKI and move_recover_resources_to_vendor_boot, and
      check serial output

Change-Id: I8008a4cad54c7c74a84cbcabe56723bf0e193025