[WPE] Create the WebPageProxy after initializing activity state flags

[carlosgcampos]

5c3ee221f66c8d514ff779a93def19cb4186603d

[WPE] Create the WebPageProxy after initializing activity state flags
https://bugs.webkit.org/show_bug.cgi?id=276062

Reviewed by NOBODY (OOPS!).

WebPageProxy queries the page client in the constructor to initialize
the activity flags. If we initialize the WKWPE::View flags before
creating the page we save an IPC message.

* Source/WebKit/UIProcess/API/wpe/WPEWebView.cpp:
(WKWPE::View::View):
(WKWPE::View::createWebPage):
* Source/WebKit/UIProcess/API/wpe/WPEWebView.h:
* Source/WebKit/UIProcess/API/wpe/WPEWebViewLegacy.cpp:
(WKWPE::ViewLegacy::ViewLegacy):
* Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.cpp:
(WKWPE::ViewPlatform::ViewPlatform):
* Source/WebKit/UIProcess/wpe/WebPreferencesWPE.cpp:
(WebKit::WebPreferences::platformInitializeStore):

https://github.com/WebKit/WebKit/commit/5c3ee221f66c8d514ff779a93def19cb4186603d

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 wincairo-tests
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt		✅ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2
	✅ 🛠 tv
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash https://github.com/WebKit/WebKit/commit/5c3ee221f66c8d514ff779a93def19cb4186603d)

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 wincairo-tests
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt		✅ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2
✅ 🛠 🧪 unsafe-merge	✅ 🛠 tv
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-commit-queue]

Committed 280567@main (6461ef8e6cca): https://commits.webkit.org/280567@main

Reviewed commits have been landed. Closing PR #30332 and removing active labels.