CameraX 1.5.0-alpha06

Added CameraInfo.getTorchStrengthLevel, CameraInfo.getMaxTorchStrengthLevel and CameraControl.setTorchStrengthLevel to allow customizing the torch brightness A new API CameraController#setTapToFocusAutoCancelDuration has been added so that users can control the auto-cancellation behavior for PreviewView tap-to-focus events. By default, CameraX cancels the focus events after 5 seconds (i.e. camera focus is reset) and this API allows to modify that duration or disable auto-cancellation altogether. FLASH_STATE_READY has been renamed to NOT_FIRED and the other FlashState constant names are simplified for better readability.