Add support for splashscreens added using LaunchStoryboard

[jayj]

Hi,

This PR adds support for splashscreens added using Launch storyboard images. Without this it just shows an black screen on iOS in the app switcher.

Uses the same way to the get image as the Cordova Splash screen plugin: (https://github.com/apache/cordova-plugin-splashscreen/blob/rel/5.0.3/src/ios/CDVSplashScreen.m#L196-L200)

UIViewContentModeScaleAspectFill ensures the aspect ratio is correct (https://github.com/apache/cordova-plugin-splashscreen/blob/rel/5.0.3/src/ios/CDVSplashScreen.m#L360-L366)

[asolntsev]

@jayj Thank you for the contribution!
Sorry, we don't actively maintain those plugins. Maybe we will review pull requests when we get back to office from quarantine.

[jayj]

Thanks @asolntsev

That's fine! I'll just keep using my fork.
Launch storyboard images seems to be new recommended way by Cordova to add splash screens now so if someone else needs this change my fork is at: https://github.com/jayj/cordova-plugin-privacyscreen/tree/master

[WuglyakBolgoink]

@asolntsev / @jayj

same as support new android-x...

@asolntsev any update for a new release?

[asolntsev]

@WuglyakBolgoink Sorry, no news. We still don't plan to maintain Cordova plugins.
We recently switched to native mobile applications, so you would better support your own fork..

[WuglyakBolgoink]

@asolntsev ok, good to know

[WuglyakBolgoink]

then, for everyone who need this fix, please use my fork

https://github.com/WuglyakBolgoink/cordova-plugin-privacyscreen