Add F2FS support for APEX build system

Add the new property payload_fs_type in apex module type. Either 'f2fs'
or 'ext4'. Default 'ext4'.

Test: m

Bug: 158453869
Change-Id: I36f373251bd597e11acb62af75437a87e2a531ec
Merged-In: I36f373251bd597e11acb62af75437a87e2a531ec