[dynamic_sensor] correctly interpret HID data

specifically, interpret HID data value as unsigned if minValue is
positive

Fix: 238391386
CRs-Fixed: 3295369
Test: See "Testing Done" in comments in ag/19889364
Change-Id: I715c2189ad90ee71e022ae131354354157694556
(cherry picked from commit d4085b7193e2489954b6c0aa5620837c795a505c)
2 files changed