Camera2/3: Move recording frame processing to its own thread.
Eino-Ville Talvala authored
Due to new deadlock opportunities from HAL3 integration, recording
frame processing needs to move out of the new frame handler into its
own thread in StreamingProcessor.

Bug: 9282913
Change-Id: I8d2926f2de9d0d395eef3c328c65caebbdbd2827
254446a8