[BH-618] Power nap fixes

Implemented various fixes:
BH-995
BH-996
BH-997
BH-998
Fixed PlayActions
and more.

[BH-903] Pre-wake up frontlight

Implemented a frontlight handling for the pre-wake up.
Major clean-up of the frontlight implementation.

[BH-1008] Fix Snooze UI and turnoff

Actually stop the snooze when turning off the alarm
Center bottom text temperature after other popup
Correct notification when setting alarm for "now"
Fix ringing alarm icon

[BH-989] Unify alarm will ring message

Unify alarm will ring message

[BH-887] Disable Idle timout on onboarding

Disable Idle timeout on onboarding

[BH-773] Add bedtime reminder application

Add bedtime time and on/off UI setup app
Add bedtime event notification window
Add bedtime audio assets
Implement bedtime notification TimeService backend
Add bedtime unittests

[BH-985] UI Fixes

- [BH-985] Wrong time units
- [BH-991] Fix UI for ringing alarm
- [BH-1005] Time and units - 12 ‘space’ h
- [BH-1007] UI fix - time setting

[BH-981] Fix "Alarm Deactivated" text alignment

Make "Alarm Deactivated" string vertically centered in a UI box

[BH-887] Increase idle timout

Increase idle timeout to 30s

[BH-935] Volume and tone selection

Added playback of volume and tone selection

[BH-978] Make default alarm enabled

Make default bell alarm enabled after onboarding.

[BH-982] Fix Home Screen issues

- [BH-982] Alarm changing process on home screen should
           start by rotating knob left or right,
- [BH-983] Inactive back button while
           changing alarm on home screen

[EGD-7754] Dates bumped in disclaimers

Dates bumped from 2020 to 2021.

[BH-976] Add BGSounds assets path

The proper assets path for application background
sounds added

[BH-1017] Fix BGSounds progress clock

The following commit uses recent BellClock widget
to match current time display to UI design

[BH-992] Correct clock widget in powernap

Correct clock widget in powernap application

[BH-958] Set info screen on critical battery turnoff

Set info screen on critical battery turnoff

[BH-887] Back to homescreen after idle

Back to homescreen after idle

[BH-872] Fix encoder hadnling

interrupt driven encoder handling

[BH-759] Bell onBoarding instruction prompts added

Added instruction prompts to Bell OnBoarding.