Remove StateMachine files from Bluetooth code base

State machine are linked with a static library to the modules utils
statemachine files provided.
This is done in the continuity of mainline process

Bug: 196435634
Bug: 190440540
Tag: #refactor
Test: atest BluetoothInstrumentationTests:A2dpStateMachineTest BluetoothInstrumentationTests:AvrcpControllerStateMachineTest BluetoothInstrumentationTests:BondStateMachineTest BluetoothInstrumentationTests:HearingAidStateMachineTest BluetoothInstrumentationTests:HeadsetServiceAndStateMachineTest BluetoothInstrumentationTests:HeadsetStateMachineTest BluetoothInstrumentationTests:HeadsetClientStateMachineTest BluetoothInstrumentationTests:LeAudioStateMachineTest BluetoothInstrumentationTests:MapClientStateMachineTest BluetoothInstrumentationTests:PbapStateMachineTest BluetoothInstrumentationTests:VolumeControlStateMachineTest
Ignore-AOSP-First: Merge conflict resolution
Change-Id: I06639d6c65271b2623deda7f0f65e5f50a33403e