[Feature] Add AAC Support

[niyatim23]

Issue #, if available:

• Running the CI for https://github.com/awslabs/amazon-kinesis-video-streams-webrtc-sdk-c/pull/1945 and addressing all the comments and fixes

What was changed?

• Added support for AAC in RTP and SDP

Why was it changed?

• This is new feature to expand support for different codecs

How was it changed?

• Introduced AAC payloader and de-payloader in RTP
• Modified the SessionDescription.c to include AAC in offer and answer

What testing was done for the changes?

• Used #1963 with kvsWebrtcClientMasterGstSample and kvsWebrtcClientMaster as master and kvsWebrtcClientViewerGstSample as viewer with H264/AAC only and H265/AAC

build % ffprobe -v error -show_entries stream=codec_name,sample_rate,width,height,channels -of default=noprint_wrappers=1 video.mkv 
codec_name=h264
width=1280
height=720
codec_name=aac
sample_rate=16000
channels=2

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 64.91228% with 20 lines in your changes are missing coverage. Please review.

Project coverage is 88.51%. Comparing base (a28e1e4) to head (8f5b0c1).

:exclamation: Current head 8f5b0c1 differs from pull request most recent head 2f21e35. Consider uploading reports for the commit 2f21e35 to get more accurate results

Files	Patch %	Lines
src/source/PeerConnection/PeerConnection.c	0.00%	6 Missing :warning:
src/source/PeerConnection/SessionDescription.c	33.33%	6 Missing :warning:
src/source/PeerConnection/Rtp.c	0.00%	4 Missing :warning:
src/source/Rtp/Codecs/RtpAacPayloader.c	89.47%	4 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1966      +/-   ##
===========================================
- Coverage    88.60%   88.51%   -0.09%     
===========================================
  Files           47       48       +1     
  Lines        12697    12750      +53     
===========================================
+ Hits         11250    11286      +36     
- Misses        1447     1464      +17     

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