feat: Implement Pocket Detection for turning off the flashlight

[Mudit200408]

How Pocket Detection Work:

1. Listen to Sensor:
   • When app start accessibility service
   (ScreenOffAccessibilityService.kt), it registers to listen to the
   Proximity Sensor.

2. Detect Pocket Block:
   • In onSensorChanged () , it reads distance from the sensor: val isBlocke
   = distance < maxRange da distance < 5f
   • If distance is less than 5cm, sensor is Blocked (phone is face down or insi
   pocket).

3. Trigger Timer:
   • If user has Pocket detection enabled, proximity sensor is Blocked, and
   flashlight is currently ON:
   • Service calls schedulePocketFlashlightTurn0ff() .
   • This schedules a delay timer (1.5 seconds) to turn off the torch.
   • If user pulls phone out of pocket before 1.5 seconds, timer is
   cancelled so torch stays on!

4. Turn Off Torch:
   • When 1.5-second timer fires, it double-checks if proximity is still blocked
   and torch is still on.
   • If yes, it calls flashlightHandler.toggleFlashlight() to turn it OFF!