camera: Fix focus distance values

Values lower than 0 are illegal on the 4.4 CTS, so do the same fix
Qualcomm did: set all near/normal/far values to Infinity.

Fixes android.hardware.cts.CameraTest#testFocusDistances

Change-Id: I36e6c9fbaa6c86950d9aeaa03b0dc114d9729067