Realign Tchap to Universal Links changes from Element iOS

[phloux]

As seen with the last rebase (1.8.20), there is some changes to the Universal Links management in Element iOS.

We also saw that Element iOS need a fix to the method definition - (BOOL)handleUniversalLinkFragment:(NSString*)fragment fromURL:(NSURL*)universalLinkURL in header file. This method has been renamed - (BOOL)handleUniversalLinkFragment:(NSString*)fragment fromLink:(UniversalLink*)universalLink in the implementation file.
And I think it's the source of the bug mentioned here : element-hq/element-ios#6492

[pixlwave]

@phlniji There's a PR to fix those now open on Element iOS: element-hq/element-ios#6522

[giomfo]

@phlniji I will let you close this issue when everything will be ok (depend on the next rebase)