Add HAL changes for EV_BRAKE_REGENERATION_LEVEL

Bug: 259451659
Test: atest VtsHalAutomotiveVehicle_TargetTest
      atest CtsCarTestCases:CarPropertyManagerTest
      atest CtsCarTestCases:VehiclePropertyIdsTest
Change-Id: I07cf21f15cca0cebe25d65dd92eb1dff57c390a1
8 files changed