FIx #21324 (#21339)

* [Python] Fix BLE init sequence in Python REPL

* Fix

src/controller/python/chip/FabricAdmin.py

@@ -64,13 +64,16 @@ class FabricAdmin:
  boot for a given fabric and ensuring it automatically picks up the right ICAC/RCAC details as well.
  '''
 
- _handle = chip.native.GetLibraryHandle()
  _isActive = False
  activeFabricIndexList = set()
  activeFabricIdList = set()
  activeAdmins = set()
  vendorId = None
 
+ @classmethod
+ def _Handle(cls):
+ return chip.native.GetLibraryHandle()
+
  def AllocateNextFabricIndex(self):
  ''' Allocate the next un-used fabric index.
  '''
@@ -133,10 +136,10 @@ def __init__(self, vendorId: int, rcac: bytes = None, icac: bytes = None, fabric
 
  print(
  f"New FabricAdmin: FabricId: {self._fabricId}({self._fabricIndex}), VendorId = {hex(self.vendorId)}")
- self._handle.pychip_OpCreds_InitializeDelegate.restype = c_void_p
+ self._Handle().pychip_OpCreds_InitializeDelegate.restype = c_void_p
 
  self.closure = builtins.chipStack.Call(
- lambda: self._handle.pychip_OpCreds_InitializeDelegate(
+ lambda: self._Handle().pychip_OpCreds_InitializeDelegate(
  ctypes.py_object(self), ctypes.c_uint32(self._fabricIndex))
  )
 
@@ -195,7 +198,7 @@ def Shutdown(self, deleteFromStorage: bool = True):
  '''
  if (self._isActive):
  builtins.chipStack.Call(
- lambda: self._handle.pychip_OpCreds_FreeDelegate(
+ lambda: self._Handle().pychip_OpCreds_FreeDelegate(
  ctypes.c_void_p(self.closure))
  )