fix(amfenc): stop busy waiting for encoder output

[cgutman]

Description

This adds a patch to use the AMF QUERY_OUTPUT encoder feature to avoid busy looping while waiting for encoder output.

According to my testing with the EncoderLatency sample in the AMF repository, this has no impact to output latency (avg/min/max encoding time in milliseconds):

• OneInOne algorithm, AMF_VIDEO_ENCODER_QUERY_TIMEOUT=0, no sleep in AMF_REPEAT case (equivalent to Sunshine today): 1.76/1.47/3.76
• OneInOne algorithm, AMF_VIDEO_ENCODER_QUERY_TIMEOUT=50, no sleep in AMF_REPEAT case (equivalent to this PR): 1.74/1.48/3.76

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components