Mark PressureObserver as not supported on Chrome Android

[foolip]

The API was exposed on Android but didn't actually work:
https://groups.google.com/a/chromium.org/g/blink-dev/c/7leKysvPZWk/m/-0fKweJ5AQAJ

[Elchi3]

Looks like this is indeed exposed but doesn't do anything. See https://issues.chromium.org/issues/341537009. Do you want to undraft this PR?

[foolip]

Cool, so https://chromiumdash.appspot.com/commit/19e7787191b2c63223077e0812a9ddbbaeced6d9 should be in 127. That means we should have a partial implementation with notes for 125-126 that says the API is exposed but doesn't work. It'll require a lot of the same note, but I don't know what else we could do.

[Elchi3]

Sounds good to me.
(Alternatively, we could just mark everything as false and pretend the early exposure never happened. This might require overrides in the collector, though)

[Elchi3]

@foolip do you want to follow up on this one?

[foolip]

Alternatively, we could just mark everything as false and pretend the early exposure never happened.

I like the simplicity of this, it means just landing this PR. I've checked that with this applied, npm run traverse -- -b chrome_android -f mirror | grep -i pressure doesn't list anything related to this feature.

[Elchi3]

Wonderful, let's land this then! 👍