media: allow 0 video encoder profiles and levels.

Some of the new encoder profile and level values are 0, so allow them
to be set. StagefrightRecorder already supports 0 values, and MediaRecorderTest
also already tests negative value for failure.

Bug: 192317919
Test: atest android.hardware.camera2.cts.RecordingTest\#testBasicEncoderProfilesRecording
Change-Id: I9d286ee84c004b21830d743ad46804be456f2bc6