[url_launcher] Handling the ActivityNotFoundExeption.

[Sempakonka]

Description

Currently on android when you call the launch method with an URL of wich there isn't any app installed that can open this URL, java will throw an ActivityNotFoundException. The user can't catch this exception savely in flutter because it was never catched in java.

This PR catches this Exception in java (wich is recommended in the documentation here).
It gives the user the ability to savely catch this exception in flutter.

Related Issues

Issue 66826

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[Sempakonka]

@googlebot I consent.

[google-cla]

All (the pull request submitter and all commit authors) CLAs are signed, but one or more commits were authored or co-authored by someone other than the pull request submitter.

We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that by leaving a comment that contains only @googlebot I consent. in this pull request.

Note to project maintainer: There may be cases where the author cannot leave a comment, or the comment is not properly detected as consent. In those cases, you can manually confirm consent of the commit author(s), and set the cla label to yes (if enabled on your project).

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[mvanbeusekom]

@googlebot I consent.

[amirh]

Missing a test

[amirh]

nit: Let's make this message about what have changed from the plugin's user perspective. e.g maybe something like: "Fixed a crash on Android when there is no activity to handle the URL intent, instead the launch method will now throw a Dart PlatformException." (assuming I got the consequences right, side note: would be helpful to describe the previous bad behavior and the new behavior in the PR description)

[amirh]

LGTM

[amirh]

Will land on green