In order to target specific variants of Fenix, we're adding schemas that
are specific that app in order to avoid collisions with the other
variants and with other forks of fenix that may have the same schemas.
The current schema for variants:
- Fenix Nightly: `fenix-nightly://`
- Fenix Beta: `fenix-beta://`
- Everything else: `fenix://`
* For #4977 - Support opening Fennec pinned website shortcuts in Fenix
Fennec's pinned website shortcuts are set to open the BrowserApp activity.
So we need a new activity alias to actually catch such Intents. Otherwise they
would open "org.mozilla.firefox/.App" without any way to inform that this is
the result of the user clicking on a pinned shortcut.
For actually checking if the newly received Intent is of a Fennec pinned
shortcut we introduce a new FennecBookmarkShortcutsIntentProcessor which will
prepare the Intent to open the shortcut's URL in a new tab.
* For #4977 - Don't keep IntentReceiverActivity on the back stack
For successive Fennec pinned shortcuts to create a new IntentReceiverActivity
and be processed as normal we need to not keep this as our task root.
* For #4977 - Test the FennecBookmarkShortcutsIntentProcessor
Sebastian Kaspari