Allow owners/admins to bypass 'Restrict saving content' and add owner-controlled override toggle

[Rocket-Space]

Motivation

• Owners reported that enabling “Restrict saving content” (noforwards) also blocked the group owner and admins, while the owner should be exempt and able to let admins be exempt as well.
• Provide an owner-controlled, per-chat option to allow admins to bypass the no-forwards restriction when the owner wants to.
• Make the new option visible and translatable so users in other locales understand the toggle.

Description

• Modified isChatNoForwards(...) to bypass the restriction for the chat creator and to allow admins to bypass when a per-chat setting is enabled by the owner by introducing shouldBypassNoForwardsForCurrentUser(...) and using it for migrated chats as well.
• Added persistent per-chat getters/setters: isNoForwardsAdminsBypassEnabled(...) and setNoForwardsAdminsBypassEnabled(...) that store the owner-controlled admin-bypass flag.
• Added a new toggle UI in ChatEditTypeActivity (saveRestrictAdminBypassCell) labeled by the new string OverrideRestriction, shown to the owner only when Restrict saving content is enabled, and wired to persist the setting when saving the chat type.
• Added translation string OverrideRestriction to base values/strings.xml and to values-es, values-pt-rBR, values-ru, and values-ar.

Testing

• Attempted to compile Java with ./gradlew :TMessagesProj:compileDebugJavaWithJavac -x lint, but the build failed due to the environment/toolchain (Unsupported class file major version 69), so no full compile test completed.
• No other automated tests were run in this environment; code diffs were inspected and a runtime UI change was implemented in ChatEditTypeActivity to reflect the new toggle behavior.

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Codex Task

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Persist admin bypass in chat state, not device-local prefs

setNoForwardsAdminsBypassEnabled writes the override flag into mainPreferences, which is local to a single client install, and shouldBypassNoForwardsForCurrentUser relies on that same local key for admin bypass decisions. This means an owner enabling the toggle does not propagate to other admins (or even the owner's other devices), so admins still cannot bypass noforwards despite the owner having enabled the option.

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