Enhance ICCID control request to Include IMEI and ICCID

[keeramis]

Description

This branch / PR adds IMEI to the response of the ICCID control request

Steps to Test

• Checkout this branch
• Flash a device (either cellular or wifi) with a tinker app
• Use particle-cli branch with the testing instructions : Feature/replace serial cmds particle-cli#713
• From particle-cli repo, run npm start -- serial mac on wifi device, or npm start -- serial identify from cellular device

Example App

void setup() {
  /* A minimal example app is super helpful 
   * for testing new features and fixes. 
   * A link to a Docs PR is even better!
   */
}

void loop() {

}

References

Particle-CLI : particle-iot/particle-cli#713
Particle-USB : particle-iot/device-os-protobuf#26
Device-os-protobuf: particle-iot/device-os-protobuf#26

---

Completeness

• User is totes amazing for contributing!
• Contributor has signed CLA (Info here)
• Problem and Solution clearly stated
• Run unit/integration/application tests on device
• Added documentation
• Added to CHANGELOG.md after merging (add links to docs and issues)

[avtolstoy]

This request should not really be necessary. MAC addresses are available since introduction of CTRL_REQUEST_NETWORK_GET_INTERFACE_LIST and CTRL_REQUEST_NETWORK_GET_INTERFACE: https://github.com/particle-iot/device-os-protobuf/blob/main/control/network.proto#L94

[avtolstoy]

We could add a new request to get a 'base MAC' and size of the allocation per device, but it's not going to be wifi-specific, it's more of a device identifier-like data similar to serial/device id/mobile secret etc.

For Gen 4 devices the size of the allocation is 4 for example:
0 - WiFi STA
1 - WiFi AP
2 - BLE
3 - Ethernet

WiFi-specific MAC should be picked from interface data and should be available since Device OS 3.x.

[keeramis]

Hi @avtolstoy This PR is ready to be merged. Pinging you here in case you would like to take a look before I merge it in. TY! Hope this can make it to 5.8.0