Handle edge-to-edge when it's not enabled by gradle property

[zoontek]

Summary:

On Android 15 (API 35), edge-to-edge is enforced by default unless the app explicitly opts out via windowOptOutEdgeToEdgeEnforcement. On Android 16+, it's always enforced regardless.

Previously, edge-to-edge behavior was only driven by the edgeToEdgeEnabled gradle property, meaning apps on Android 15+ could be in edge-to-edge mode without React Native being aware of it, leading to incorrect insets / layout behavior.

This PR introduces isEdgeToEdge, a computed value that accounts for the OS-level enforcement in addition to the gradle flag, and replaces most usages of isEdgeToEdgeFeatureFlagOn with it. A new initEdgeToEdge(context, flag) function replaces setEdgeToEdgeFeatureFlagOn() and reads the theme attribute to detect opt-out on API 35.

Changelog:

[ANDROID] [FIXED] - Handle edge-to-edge when it's not enabled by the edgeToEdgeEnabled gradle property but enforced by the OS (Android 15+)

Test Plan:

• Verify on Android 15 device/emulator without edgeToEdgeEnabled = true: isEdgeToEdge should be true (unless opted out via theme attribute).
• Verify on Android 16+ device/emulator: isEdgeToEdge should always be true.
• Verify on Android 14 and below without the flag: isEdgeToEdge should be false.
• Verify with edgeToEdgeEnabled = true: behavior unchanged, isEdgeToEdge is true on all API levels.

[meta-codesync]

@alanleedev has imported this pull request. If you are a Meta employee, you can view this in D100437440.

[alanleedev]

This could be an issue when the context passed in is Application context and windowOptOutEdgeToEdgeEnforcement is set on the Activity. We may incorrectly decide there is no opt-out attribute set.

[alanleedev]

Actually, I think you missed adding initEdgeToEdge() in ReactActivityDelegate. If this is fixed then initEdgeToEdge() is called first from ReactNativeApplicationEntryPoint (with the Application context) and then again from ReactActivityDelegate (with the Activity context). There may be some edge cases but it may still work mostly.

[zoontek]

@alanleedev Fixed in acacab6. It even allows us to remove the public attribute on initEdgeToEdge

[zoontek]

@alanleedev @cortinico This actually even allows us to remove isDeviceRunningEdgeToEdge, making the PR changes minimal.

[cortinico]

@alanleedev this can be re-imported imho

[react-native-bot]

This pull request was successfully merged by @zoontek in c2280e3

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