[addons][inputstream] addon "C" style fixes and doxygen define add

[AlwinEsch]

Description

These are minor changes made by #17438 which are good for me.

Commit 1:

[addons][inputstream] add inttypes.h and string.h to StreamCrypto.h

This done to match his structure parts the "C" style.

The enum and static const uint8_t FLAG_SECURE_DECODER = 1; becomes on
other request changed to match "C".

Commit 2:

[docs] update doxygen to define __cplusplus to include related parts

Also are on "xbmc/addons/kodi-addon-dev-kit/doxygen/Doxyfile" some headers
now included where for addons.

Commit 3:

[videoplayer] update TimingConstants.h to support also "C"
There was some time ago this changed to C++ style where is cool and good.

But this also used by addons and to allow use by "C" only the constexpr bring
problems.

There becomes now the same added as "C" define (style like earlier) and then
separated with a #ifdef __cplusplus between both.

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

Checklist:

• My code follows the Code Guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the Contributing document
• I have added tests to cover my change
• All new and existing tests passed

[garbear]

Commit 1 looks ok.

Commit 2 looks ok.

Commit other 2 looks ok ;)

@lrusak the test failure is:

10:03:12 [ RUN      ] TestDateTime.GetAsTimeStamp
10:03:12 /Users/Shared/jenkins/workspace/OSX-64/xbmc/test/TestDateTime.cpp:577: Failure
10:03:12 Value of: dateTime == fileTime
10:03:12   Actual: false
10:03:12 Expected: true
10:03:12 [  FAILED  ] TestDateTime.GetAsTimeStamp (1 ms)

Does this look problematic?

EDIT: Per here it seems related to the daylight savings time change over the weekend.

[AlwinEsch]

Ups 😁 about :

Commit other 2 looks ok ;)

is 3 now 😌