[omni] Implement 2-stage for LPNH.

Use existing override duration and touch slop multiplier values for the 1st stage. Times `TWO_STAGE_MULTIPLIER` for the 2nd stage.
See http://shortn/_WqYj0buH7R

Bug: 330446193
Test: manual
Flag: legacy ENABLE_LPNH_TWO_STAGES disabled
Change-Id: Ic200f431524578d17fd98ebfbc65e44e0971e31c
3 files changed