Add support for reading NFC tags

[zeehio]

This commit adds support for reading and parsing NFC tags. For instance, an NFC tag with "tg:msg?text=Hello" as URI, is now detected and processed.

Manifest changes:

• Uses feature NFC
• Uses permission NFC
• Declares intent for NFC tags with scheme "tg"

LaunchActivity changes:

• Move logic to parse telegram URIs from handleIntent method to its own class: ui/UriAction.java. This allows to use the same code from written URLs and NFC tags.
• Add logic to parse NDEF records.

UriAction.java: New class to parse actions triggered by URIs.

[sergeysova]

Resolve conflicts, please

[zeehio]

@lestad this Pull Request (like many others) has been blatantly ignored for many months now. As you may understand this is quite frustrating.

I won't move a finger to rebase this pull request unless there is a commitment to add this feature to telegram. Even if that commitment existed I don't know when I will have time to do that.

Now you pop up, without any kind of explanation of your relation to the telegram project, asking me to spend time working on something that I don't have any clue if it will be ever merged.

So answer me this, please: Why should I care to resolve conflicts?

Unless there is a good answer to that question feel free to resolve conflicts yourself. The branch is public.

[zeehio]

After more than two years, I'm closing this and unsubscribing myself from the PR.