Check for disabled camera in MediaRecorderClient

To avoid encountering the getService timeout, we should first check if
the camera service has been disabled before fetching it.

Bug: 163322246
Test: ran on device with disabled camera to verify getService was
skipped

Change-Id: I47e8878182fe82c1473da59c8054ee7281efe23e
Merged-In: I47e8878182fe82c1473da59c8054ee7281efe23e
(cherry picked from commit fa344e04)