BDK_Flutter missing policy modules

[OpenOne2925]

In the flutter version of the BDK,
there seem to be missing the policy module to extract the policy tree from the wallet and the policy_path methods on transaction builder to provide paths when creating transactions.

When trying yo create a transaction with a descriptor that contains multisig and timelock rules, this error is being returned instead:
E/flutter (14275): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Exception: Error: SpendingPolicyRequiredException( Spending policy is not compatible with: KeychainKind.External )

[BitcoinZavior]

Depends on bitcoindevkit/bdk-ffi#605