closing the activity prematuraly caused uri permissions to be revoked

Check if path for URI is accessible

The path extracted from the Cursor might not be accessible for Conversations. FileUtils accesses URI information through the ContentProvider, so this wouldn't be noticed.
Fixes sharing from open-keychain's TemporaryContentProvider

Shows XMPP URI as links, other than Web URL's and Email Addresses. Also performs respective actions on clicking XMPP URI.