Fix Jank when factory resetting

A progress dialog is shown and quickly disappear caused the UI jank.
The progress dialog should be shown only when erase external SD card
is needed because WipeDataTask only wipe SD card in it background
task. Other factory reset function is done in Thread thr.

Fixes: 140594314
Test: manual
Change-Id: I71ab1577165ceab79704b359c47c3f752d9dfc79