* changes:
Register reserved offer
Add L2capNetworkSpecifier to blanket offer
Add blanket offer to L2capNetworkProvider
Add empty L2capNetworkProvider
Implement matching semantics for L2capNetworkSpecifier
Do not allow L2CAP specifier with ROLE_SERVER and remote address set
Do not redact PSM from L2capNetworkSpecifier
Use IntRange for setPsm
Improve documentation of L2capNetworkSpecifier
Have setRemoteAddress accept a Nullable remoteAddress