Add capability MOTION TRACKING to EmulatedFakeCamera3

Motion Tracking is a feature to track fast moving objects, which
limits max exposure time to 20 ms.

Bug: 111746823

Test: run cts -m CtsAppTestCases -t android.app.cts.SystemFeaturesTest#testCameraFeatures
Change-Id: I4a49c940d15be9e13129788dc65d09223c19b6db
2 files changed