fs_mgr: change the log level in fs_mgr_get_boot_config()

fs_mgr might try to get a non-existing config through fs_mgr_get_boot_config()
on a device (e.g., for backward compatibility). Lower the log level to INFO
so it won't appear on the recovery screen.

Bug: 35811655
Test: recovery boot sailfish
Change-Id: I81497259aff3691740170abeef932d363b52be35
1 file changed