getMediaExtension static method Null safety

1. baguette
2. UriUtils
3. UriUtils
4. getMediaExtension static method

UriUtils class

1. Constructors
2. UriUtils
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. addImageUrlPrefix
13. getMediaExtension
14. isImageUri
15. isLocalUri
16. isMediaUri
17. isRemoteUri
18. isVideoUri
19. launch
20. launchCall
21. launchEmail
22. launchMap