mm-video-v4l2: vidc: Handle native_handle meta mode

 - Meta mode for sending native handles from camera
   should be supported along with rest of the modes.

BUG: 34516149
Test: Camera CTS API1 and API2 using legacy Hal1 module
Change-Id: Ia9dc5936b0b5a2792b1286b979030f0f5b6104a1