Pass flash erase & logical block size to mke2fs

This information can be used to tune ext4 stripe and stride in the
userdata partition for better performance

Test: Build & flash userdata, confirm correct stripe & stride values
Bug: 33243520
Merged-In: Ia97cdd2d0239c3484b895fce49299f692ef911d8
Change-Id: Ia97cdd2d0239c3484b895fce49299f692ef911d8
Signed-off-by: Connor O'Brien <connoro@google.com>