Exit PiP when launched externally with Intents

[ionutbedregeanu]

For #6755

pip.mp4

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• Tests: This PR includes thorough tests or an explanation of why it does not
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[rocketsroger]

From test it works. But when I did the following:

1. open Focus and start streaming from youtube, set to full screen.
2. swipe up and go to home (device home) to trigger PiP.
3. open Fenix go to google.com, share to focus

Expected:
4. PiP dismissed, google.com opened. Focus should be now showing in portrait orientation.

Actual:
4. PiP dismissed, google.com opened. Focus stuck in landscape mode and doesn't matter how I rotate the device it won't switch to portrait mode.

[Mugurell]

Actual: 4. PiP dismissed, google.com opened. Focus stuck in landscape mode and doesn't matter how I rotate the device it won't switch to portrait mode.

Sounds like a race between
handling the new intent and
exiting fullscreen which would trigger exiting immersive mode and unlocking the orientation,
similar to the mozilla-mobile/fenix#24040 Fenix issue.

[ionutbedregeanu]

From test it works. But when I did the following:

1. open Focus and start streaming from youtube, set to full screen.
2. swipe up and go to home (device home) to trigger PiP.
3. open Fenix go to google.com, share to focus

Expected: 4. PiP dismissed, google.com opened. Focus should be now showing in portrait orientation.

Actual: 4. PiP dismissed, google.com opened. Focus stuck in landscape mode and doesn't matter how I rotate the device it won't switch to portrait mode.

@rocketsroger First of all thanks for review.
I took a look and it seems a different bug, which can be reproduced also if we are trying to open a home screen shortcut while PiP is active. In my opinion we should create a separate ticket for it

[ionutbedregeanu]

New ticket created for #6768 (comment)

[ionutbedregeanu]

@rocketsroger Can you help with an r here?