[EGD-5385] Fix unallowed use of ff_rename

Fix unallowed use of ff_rename FFAT function

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5334] Fix phone crash when MTP access

Fix phone crash when accessing file when new filesystem is used

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5014] Add eMMC block device API

Add PureOS wrapper for eMMC driver with support
for basic block device operations.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5102] Fix compile on rt1051 platform

It is initial commmit which fix compilation after
vfs. global object removal. It still need implementation
newlib syscalls.

[EGD-5102] Fix warning errors in the BSP

Fix warning errors in the BSP module

[EGD-5737] Merge with master

Keep experimental up to date with changes from master

[EGD-5088] Change new filesystem implementation

Removed deprecated vfs calls from all applications.

[EGD-4850] Fix of statics between USB CDC and ServiceDesktop

Handling queues with static std::string implementation caused
problem of double-free memory on turning off simulator. Applied
solution to the problem is to pass ownership of queued string to
a receiver side.

[EGD-5346] Refactor of battery charger BSP

Pure refactoring of battery charger to privide compliance
 with modern C++ standards. Done before implementation of
battery charging algorithms.

Merge branch 'master' into stable

[EGD-5086] Fix voice not starting when calling

Due to a race condition between source and sink voice is not always
starting when calling. Introduce audio stream connections to avoid
race condition and improve handling of audio start and stop operations.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[EGD-4887] Add PLL2 clock switching

Pll2 will be disabled at the lowest CPU frequency,
which will save power

[EGD-5086] Change audio device switching logic

Upon hardware change event, audio profile had been switched multiple
times forcing redundant initializations of all related objects. Logic
has been optimized and prepared for further refactor. Now upon hardware
event objects are initialized exactly once.

[EGD-5078] Fix Debug UART conditional enabling

Uart debug will be enabled only when redirecting logs to Uart

[EGD-4881] Add oscillator clock switching mechanisms

Osc will change automatically at the lowest CPU frequency,
which will save power

[EGD-5050] Add brownout detection

Brownout detectection realized through charger driver

[EGD-5089] linux battery bsp charging done added