Temporary LE keys are possible only through ctkd

If BR/EDR temporary pairing is followed by the LE pairing for the same device, the temporary bond type state from the BR/EDR pairing causes the stack to remove the LE pairing keys as well. Since auto accepted temporary LE pairing is not supported. Only way to temporary keys would be through CTKD.
So the LE keys should be autonomously removed only if they are generated through CTKD on a BR/EDR temporary pairing.

Test: mmm packages/modules/Bluetooth
Test: Connect rfcomm insecure connections socket with the remote device, connect and pair over LE transport using public addresses.
Bug: 309149781
Bug: 319695663

Change-Id: I37882ef6735ab0651578aecbd28ab03a5fc65705