fix(permission): exclude disabled ContractType 51 and surface unknown ops in UI

[Federico2014]

Summary

Fixes two related problems in the interactive updateaccountpermission flow, both stemming from how the active-permission operations bitmap is handled.

1. Default active permission grants a disabled ContractType

When an account has no existing active permission, the flow applied a hardcoded default operations bitmap that granted ContractType 51 (ShieldedTransferContract). Shielded transfer is disabled on mainnet and most networks, so the node rejected the whole AccountPermissionUpdate:

CONTRACT_VALIDATE_ERROR, Contract validate error : 51 isn't a validate ContractType
UpdateAccountPermission  failed !!!

This triggered even when the user only edited owner_permission, because the default active permission is auto-applied.

Fix: clear bit 51 in the default bitmap (UpdateAccountPermissionInteractive.java): byte index 6 0xfb -> 0xf3, i.e. 7fff1fc0033efb0f... -> 7fff1fc0033ef30f.... This matches the canonical ALL_OPERATIONS / AVAILABLE_OPERATIONS lists in the same file, which already exclude 51.

2. Unknown/disabled ops were silently hidden and undeletable in the UI

Operations absent from operationsMap (such as the disabled ContractType 51) were filtered out of the preview and the edit/delete menus. As a result a user could neither see nor remove such an op through the interactive UI — making the problem above impossible to self-diagnose or fix manually.

Fix: add opLabel(code) and contractTypeName(code) helpers and render every operation with a visible placeholder (e.g. Unsupported/Disabled op 51) instead of dropping it. Four sites updated:

• "Current allowed operations" list in editActivePermissions (removed the silent .filter(...))
• the delete list
• printPermissionSummary preview
• printPermissionDetail final preview

An unknown/disabled op is now visible and deletable.

Verification

• Decoded both bitmaps: only op 51 is removed; no other bits change.
• ./gradlew compileJava passes.
• No tests pinned the old bitmap string.

Scope

• Single file changed: UpdateAccountPermissionInteractive.java.
• The add-operation menu already sources from AVAILABLE_OPERATIONS (which excludes 51), so it was left unchanged.

Fixes #934