tbs: Add dump of TBS state

TbsService instance:
        Ringer Mode: 2
        Current call list:
                Friendly name: T.s. .r.e.d.y.N.m.
                        State: ALERTING
                        URI: tel:xxxxxxxxx
                        Flags: OUTGOING
        Silent mode: false
        CCC states for device: XX:XX:XX:XX:2C:08
                Characteristic: TERMINATION_REASON, value: NOTIFICATION
                Characteristic: INCOMING_CALL, value: NOTIFICATION
                Characteristic: CALL_FRIENDLY_NAME, value: NOTIFICATION
                Characteristic: BEARER_PROVIDER_NAME, value: NOTIFICATION
                Characteristic: BEARER_TECHNOLOGY, value: NOTIFICATION
                Characteristic: BEARER_LIST_CURRENT_CALLS, value: NOTIFICATION
                Characteristic: STATUS_FLAGS, value: NOTIFICATION
                Characteristic: CALL_STATE, value: NOTIFICATION
                Characteristic: CALL_CONTROL_POINT, value: NOTIFICATION
        CCC states for device: XX:XX:XX:XX:0F:2E
                Characteristic: TERMINATION_REASON, value: NOTIFICATION
                Characteristic: INCOMING_CALL, value: NOTIFICATION
                Characteristic: CALL_FRIENDLY_NAME, value: NOTIFICATION
                Characteristic: BEARER_PROVIDER_NAME, value: NOTIFICATION
                Characteristic: BEARER_TECHNOLOGY, value: NOTIFICATION
                Characteristic: BEARER_LIST_CURRENT_CALLS, value: NOTIFICATION
                Characteristic: STATUS_FLAGS, value: NOTIFICATION
                Characteristic: CALL_STATE, value: NOTIFICATION
                Characteristic: CALL_CONTROL_POINT, value: NOTIFICATION
        Device: XX:XX:XX:XX:98:65, access: ACCESS_ALLOWED
        Device: XX:XX:XX:XX:2C:08, access: ACCESS_ALLOWED
        Device: XX:XX:XX:XX:0F:2E, access: ACCESS_ALLOWED
        Device: XX:XX:XX:XX:B8:41, access: ACCESS_ALLOWED

Tag: #feature
Bug: 273622512
Test: atest GoogleBluetoothInstrumentationTests
Change-Id: Ic977430e2ce0d56604dc7d01cf091e168efaa6fa