* 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
* For #5334: added private custom tab processor
* For #5334 - Fixes up IntentReceiverActivity for handling intents
* For 5334: update styling for private custom tabbs
* For 5334: update tests to account for new processors
Note that two are still failing. These appear to be true failures, and will be corrected in a later commit.
* For 5334: fixes bug introduced by changes to IntentReceiverActivity
RCA: intent className and extra were previously set based on which processors matched, not which successfully processed. This patch reintroduces that behavior.
* For 5334: add tests for custom tabs processing
Sebastian Kaspari