feat(android): Android 12 Splash Screen API

[ItsChaceD]

This PR adds support for the optional usage of the Android 12 Splash Screen API.

• This will affect all devices running SDK Version 31+ (required)
• Supports Fade Out Animation and Animated Icons
• Backwards compatible with SDK < 31 if opted-in to using new API.

closes #459
closes #561

[jcesarmobile]

Added a few comments.

Also I think there is something wrong with the README, there are some style changes that shouldn't be there.
If I run npm run build it undoes most of the changes, can you run it too and see if it undoes the changes?

[jcesarmobile]

Added a few comments.

Also, all the configuration options that won't work on the new splash should include a note that says something like "Does't work in Android 12+ devices or if using Android 12 Splash Screen API" or similar messaging.

[jcesarmobile]

When using this configuration:

"plugins": {
    "SplashScreen": {
	  "launchAutoHide": true,
	  "launchShowDuration": 7000
    }
}

Then when I call Show with auto hide or Show and then Hide after a timeout, the splash never disappears.

Adding onPreDrawListener = null; on line 142 seems to fix the issue, but there might be another way.

[moradopablo]

Hi, I have a question: to avoid the stretched image in Android 11 (#459), the only solution would be to modify the style.xml file in the Android project? Thank you very much in advance.