update sdks of sample apps, fix non null assertion in kotlin code

[michaelknoch]

Type of change: bugfix

Motivation (current vs expected behavior)

Fixes a compilation assertion in SDLActivity

> Task :UIKit:compileDebugKotlin FAILED
e: file:///mobile-app/RNPlayerComponent/NativePlayer/UIKit/src/main/java/org/libsdl/app/SDLActivity.kt:241:30 Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type InputDevice?
e: file:///mobile-app/RNPlayerComponent/NativePlayer/UIKit/src/main/java/org/libsdl/app/SDLActivity.kt:241:73 Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type InputDevice?

Please check if the PR fulfills these requirements

• [ ] Self-review: I am confident this is the simplest and clearest way to achieve the expected behaviour
• [ ] There are no dependencies on other PRs or I have linked dependencies through Zenhub
• [ ] The commit messages are clean and understandable
• [ ] Tests for the changes have been added (for bug fixes / features)