[bluez/bluez] 74b068: shared/hfp: Add Enhanced Call Status support

[fdanis-oss <noreply@github.com>]

  Branch: refs/heads/1021420
  Home:   https://github.com/bluez/bluez
  Commit: 74b0687c958c2f59991c84c429c40ba9e1f330a2
      https://github.com/bluez/bluez/commit/74b0687c958c2f59991c84c429c40ba9e1f330a2
  Author: Frédéric Danis <frederic.danis@collabora.com>
  Date:   2025-11-10 (Mon, 10 Nov 2025)

  Changed paths:
    M src/shared/hfp.c
    M src/shared/hfp.h
    M unit/test-hfp.c

  Log Message:
  -----------
  shared/hfp: Add Enhanced Call Status support

In case remote device supports the Enhanced Call Status the calls are
created, updated or removed based on results of AT+CLCC commands.
This implies to send an AT+CLCC command on reception of +CIEV events
for <call>, <callsetup> or <callheld> indicators instead of managing
calls directly.

This updates the tests using FULL_SLC_SESSION:
- /HFP/HF/ENO/BV-01-C
- /HFP/HF/ICA/BV-01-C
- /HFP/HF/ICA/BV-02-C
- /HFP/HF/ICA/BV-03-C
- /HFP/HF/ICA/BV-04-C-full


  Commit: 9303221ff05070965671a0f1df56dd5a5a7df3cb
      https://github.com/bluez/bluez/commit/9303221ff05070965671a0f1df56dd5a5a7df3cb
  Author: Frédéric Danis <frederic.danis@collabora.com>
  Date:   2025-11-10 (Mon, 10 Nov 2025)

  Changed paths:
    M unit/test-hfp.c

  Log Message:
  -----------
  unit/test-hfp: Add Enhanced Call Status tests

This add the following test:
- /HFP/HF/ECS/BV-01-C
  Verify that the HF can request the status of current calls in the AG.
- /HFP/HF/ECS/BV-02-C
  Verify that the AG can send the correct call status when an SLC is
  initialized.
- /HFP/HF/ICA/BV-07-C-full
  Verify that HF can connect to an AG that is receiving an in-coming
  call.


Compare: https://github.com/bluez/bluez/compare/74b0687c958c%5E...9303221ff050

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