Skip F2FS formatting for dev option enabled devices

F2FS does not support page_size!=block_size configuration, and
dev option devices need to toggle between 4K/16K mode, hence F2FS
requires a data wipe every time page size changes. This is inconveinent,
skip F2FS formatting instead.

Test: th
Bug: 353436188
Change-Id: Ic33dbc39c16db3aee4c47349a9693aacec240de8