[EGD-7459] Fixed factory reset process

Fixed the factory reset process.

[BH-862] Snooze settings

Added snooze settings flow.

[EGD-7077] Rework of BT connection status in AppSettings

Reworked AppSettings handling of BT devices to be prepared for
handling the HFP profile, eliminating by the way few bugs and
speeding up the flow (by getting rid of few refreshes).

Added unit tests for handling the BT devices flow

[BH-662] Handle alarm turn off and snooze

Handle alarm turn off and snooze
Music stop not included

[EGD-7433] Remove legacy fileindexer database

Removed legacy fileindexer database. New one is already implemented.

[EGD-7335] Integartion of file indexer with database

Integrated core file indexer with its database.
Modfied necessary queries.
Moved service file indexer to pure product specific
folder

[CP-578] Fix handling of requests for disabled endpoints

Added NullEndpoint (as in Null Pattern) to respond
in lieu of unknown endpoint

[CP-346] USB stops working during file transfer

Increased CDC receive queue length to 1024 elements
Improved debug output in Filesystem EP

[BH-851] PowerNap alarms implementation

The following commit provides an implementation to an PowerNap's alarm,
that provides appropriate abstraction for an alarm mechanics.

As the PowerNap's alarm can be active only on the application, the
implementation does not make use of Bell's AlarmHandlers.

[EGD-7408] Phonebook empty list fix

Fixed phonebook empty list. Added deep refresh
for other empty lists.

[EGD-7553] Fixed typo

Fixed typos in requirements.txt.

[EGD-7409] Empty list additions and fixes

Fixed bug in empty lists displays and added missing
empty lists in applications.

[EGD-6914] Fix missing no sim message

Added QSIMSTAT urc handler and command parser. Added
sim insertion state in SimCard. Now there No Sim response
is sended if sim is missing. Sim not respond timer removed
from Application Manager.

[EGD-7238] Fixed applications deinit handers

All apps deinit handlers should call the base function.

[EGD-7260] Fixed meditation timer options

Fixed meditation timer options displaying.

[BH-823] Pre-wake up settings - part I

Prepare MVP classes for `BellSettingsPrewakeUpWindow`

[BH-831] Show popup on Alarm activation - part II

- create ApplicationBell with attachPopups method overridden,
- change parent for all Bell apps from Application to ApplicationBell,
- create AlarmActivatedWindow popup which shows on AlarmActivated event

[EGD-4808] Add band gap switching

To reduce the power consumption, we switch the band gap
to the low power mode.

[EGD-4809] Add LDO switching

To reduce the power consumption, we switch LDO
to the low power mode.

[EGD-7265] Fixed displaying of the song's duration

Fixes song's duration displaying.