GrapheneOS update: new exec spawning, app toggle, July 2026 security patch

GrapheneOS version 2026071100 replaces the secure exec spawning feature with a new implementation, adding a per-app toggle to enhance application compatibility.

The update raises the security patch level to July 5, 2026, and includes the latest Pixel driver and firmware code.

It also addresses multiple upstream bugs affecting multi-user Wi-Fi service, geocoding, external display mirroring, and screen recording.