Add direct report mode support API with stub implementation.
* new SensorDirectChannel class to represent direct channel and
hold related constants.
* new methods in SensorManager to create/destroy direct channel
* new method in SensorManager to config sensor report in direct
channel
* new methods in Sensor to expose direct report related capability
of sensor.
Test: tested with demo app
Bug: 30985702
Change-Id: Ic03c67bea4ed0a728d3d783e95de6c59cf663cca
ccf0c8edea