Add feature to detect device's remove/insert events.

[walker-WSH]

Description

Add feature to detect device's remove/insert events. When device is inserted, win-dshow can restore camera when received event.
However, to be enable to detect remove/insert, we must success to initialize dshow firstly.
Besides, it seems insert/remove events won't be sent for audio filter.

Motivation and Context

Help win-dshow to restore camera when device is inserted.

How Has This Been Tested?

Tested on Window10 with Legitech C920

Types of changes

New feature (non-breaking change which adds functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[walker-WSH]

After merging this PR, we can improve win-dshow to restore camera automatically:

[walker-WSH]

@jp9000 Request your review

[dodgepong]

This will not be reviewed until some time after v27 is released.

[walker-WSH]

This will not be reviewed until some time after v27 is released.

Got it!

[walker-WSH]

Hmm~
will this PR be merged ？

[jp9000]

sorry about that, I'll try to get around to it sooner than later, it's just easy for things to slide (especially when they're on repositories other than the main repository)

[walker-WSH]

@PatTheMav @RytoEX
can you help review this PR ? thanks~