Remove snapuserd from vendor ramdisk

When BOARD_MOVE_RECOVERY_RESOURCES_TO_VENDOR_BOOT is set,
snapuserd.recovery will be installed to vendor ramdisk, which we don't
want. To remove snapuserd from vendor ramdisk, remove
snapuserd.recovery. And only include it if dedicated recovery partition
is enabled. For non-dedicated recovery case, boot partition contains
snapuserd.

Test: th
Test: acloud create --local-image --local-instance, install OTA, reboot
Change-Id: Ib8173f68a1f43b736fe609977a36ad4851e0c367